MATERIAL SAFETY      3M
DATA SHEET           3M Center
                     St. Paul, Minnesota
                     55144-1000
                     1-800-364-3577 or (651) 737-6501 (24 hours)
                                                                             
       Copyright, 1999, Minnesota Mining and Manufacturing Company.
       All rights reserved.  Copying and/or downloading of this
       information for the purpose of properly utilizing 3M products
       is allowed provided that:
       1) the information is copied in full with no changes unless
          prior agreement is obtained from 3M, and
       2) neither the copy nor the original is resold or otherwise
          distributed with the intention of earning a profit thereon.
                                                                             
DIVISION:  I&C NEW PRODUCTS DEPARTMENT
TRADE NAME:
  NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
ID NUMBER/U.P.C.:
  44-0028-0103-1    -     -     -   98-0400-0028-7  00-51115-02096-4
  98-0400-0029-5  00-51115-02097-1  98-0400-0032-9    -     -     -
  98-0400-0033-7    -     -     -   98-0400-0034-5  00-51115-02102-2
  98-0400-0035-2  00-51115-02103-9  98-0400-0036-0    -     -     -
  98-0400-0037-8  00-51115-02105-3  98-0400-0038-6    -     -     -
  98-0400-0039-4  00-51115-02107-7  98-0400-0040-2    -     -     -
  98-0400-0041-0  00-51115-02109-1  98-0400-0042-8    -     -     -
  98-0400-0043-6  00-51115-02111-4  98-0400-0044-4    -     -     -
  98-0400-0045-1  00-51115-02113-8  98-0400-0046-9    -     -     -
  98-0400-0047-7  00-51115-02115-2  98-0400-0048-5    -     -     -
  98-0400-0049-3  00-51115-02117-6  98-0400-0050-1    -     -     -
  98-0400-0051-9  00-51115-02119-0  98-0400-0052-7    -     -     -
  98-0400-0053-5  00-51115-02121-3  98-0400-0054-3    -     -     -
  98-0400-0055-0  00-51115-02123-7  98-0400-0056-8    -     -     -
  98-0400-0057-6  00-51115-02125-1  98-0400-0058-4    -     -     -
  98-0400-0059-2  00-51115-02127-5  98-0400-0060-0    -     -     -
  98-0400-0061-8  00-51115-02129-9  98-0400-0062-6    -     -     -
  98-0400-0063-4    -     -     -   98-0400-0064-2    -     -     -
  98-0400-0065-9  00-51115-02133-6  98-0400-0066-7    -     -     -
  98-0400-0067-5  00-51115-02135-0  98-0400-0068-3    -     -     -
  98-0400-0069-1  00-51115-02137-4  98-0400-0070-9    -     -     -
  98-0400-0071-7  00-51115-02139-8  98-0400-0072-5    -     -     -
  98-0400-0073-3  00-51115-02141-1  98-0400-0074-1    -     -     -
  98-0400-0075-8  00-51115-02143-5  98-0400-0076-6  00-51115-02144-2
  98-0400-0077-4    -     -     -   98-0400-0078-2  00-51115-02146-6
  98-0400-0079-0    -     -     -   98-0400-0080-8  00-51115-02148-0
  98-0400-0081-6    -     -     -   98-0400-0082-4  00-51115-02150-3
  98-0400-0083-2    -     -     -   98-0400-0084-0  00-51115-02152-7
  98-0400-0085-7    -     -     -   98-0400-0086-5  00-51115-02154-1
  98-0400-0087-3    -     -     -   98-0400-0088-1  00-51115-02156-5
  98-0400-0089-9    -     -     -   98-0400-0092-3  00-51115-02160-2
  98-0400-0093-1  00-51115-02161-9  98-0400-0094-9  00-51115-02162-6
  98-0400-0095-6  00-51115-02163-3  98-0400-0096-4  00-51115-02164-0
  98-0400-0097-2  00-51115-02165-7  98-0400-0098-0  00-51115-02166-4
  98-0400-0099-8  00-51115-02167-1  98-0400-0100-4  00-51115-02168-8
  98-0400-0101-2  00-51115-02169-5  98-0400-0102-0  00-51115-02170-1
  98-0400-0103-8  00-51115-02171-8  98-0400-0104-6  00-51115-02172-5
  98-0400-0105-3  00-51115-02173-2  98-0400-0106-1  00-51115-02174-9
-----------------------------------------------------------------------------
Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately

MSDS: NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
November 19, 1999                                                     PAGE  2
                                                                             
-----------------------------------------------------------------------------
HEADING     (continued)
-----------------------------------------------------------------------------
                                                                             
  98-0400-0107-9  00-51115-02175-6  98-0400-0108-7  00-51115-02176-3
  98-0400-0109-5  00-51115-02177-0  98-0400-0110-3  00-51115-02178-7
  98-0400-0111-1    -     -     -   98-0400-0112-9  00-51115-02180-0
  98-0400-0113-7    -     -     -   98-0400-0114-5    -     -     -
  98-0400-0115-2    -     -     -   98-0400-0116-0    -     -     -
  98-0400-0117-8    -     -     -   98-0400-0118-6  00-51115-02186-2
  98-0400-0119-4  00-51115-02187-9  98-0400-0120-2    -     -     -
  98-0400-0121-0  00-51115-02189-3  98-0400-0122-8  00-51115-02190-9
  98-0400-0123-6    -     -     -   98-0400-0124-4    -     -     -
  98-0400-0125-1    -     -     -   98-0400-0126-9    -     -     -
  98-0400-0127-7    -     -     -   98-0400-0128-5    -     -     -
  98-0400-0129-3    -     -     -   98-0400-0130-1    -     -     -
  98-0400-0131-9    -     -     -   98-0400-0132-7    -     -     -
  98-0400-0133-5    -     -     -   98-0400-0134-3    -     -     -
  98-0400-0138-4  00-51115-02206-7  98-0400-0139-2  00-51115-02207-4
  98-0400-0140-0  00-51115-02208-1  98-0400-0141-8    -     -     -
  98-0400-0142-6  00-51115-02210-4  98-0400-0143-4  00-51115-02211-1
  98-0400-0144-2  00-51115-02212-8  98-0400-0145-9  00-51115-02213-5
  98-0400-0146-7  00-51115-02214-2  98-0400-0147-5  00-51115-02215-9
  98-0400-0148-3  00-51115-02216-6  98-0400-0155-8  00-51115-02223-4
  98-0400-0156-6  00-51115-02224-1  98-0400-0157-4  00-51115-02225-8
  98-0400-0158-2    -     -     -   98-0400-0159-0  00-51115-02227-2
  98-0400-0160-8  00-51115-02228-9  98-0400-0161-6    -     -     -
  98-0400-0162-4  00-51115-02230-2  98-0400-0163-2  00-51115-02231-9
  98-0400-0164-0    -     -     -   98-0400-0165-7    -     -     -
  98-0400-0166-5  00-51115-02234-0  98-0400-0167-3  00-51115-02235-7
  98-0400-0183-0  00-51115-02251-7  98-0400-0205-1  00-51115-02418-4
  98-0400-0206-9  00-51115-02419-1  98-0400-0207-7    -     -     -
  98-0400-0208-5  00-51115-02421-4  98-0400-0209-3  00-51115-02422-1
  98-0400-0210-1  00-51115-02423-8  98-0400-0215-0  00-51115-02428-3
  98-0400-0219-2  00-51115-02432-0  98-0400-0222-6    -     -     -
  98-0400-0223-4    -     -     -   98-0400-0224-2    -     -     -
  98-0400-0256-4    -     -     -   98-0400-0257-2    -     -     -
  98-0400-0261-4  00-51115-00257-1  98-0400-0294-5  00-51115-00267-0
  98-0400-0299-4  00-51115-00271-7  98-0400-0329-9  00-51115-00301-1
  98-0400-0351-3  00-51115-00313-4  98-0400-0357-0  00-51115-00318-9
  98-0400-0388-5    -     -     -   98-0400-0389-3    -     -     -
  98-0400-0431-3    -     -     -   98-0400-0449-5    -     -     -
  98-0400-0450-3    -     -     -   98-0400-0495-8  00-51115-00691-3
  98-0400-0541-9  00-51115-02459-7  98-0400-0563-3  00-51115-02475-7
  98-0400-0565-8    -     -     -   98-0400-0622-7  00-51115-02654-6
  98-0400-0641-7    -     -     -   98-0400-0642-5    -     -     -
  98-0400-0643-3    -     -     -   98-0400-0644-1    -     -     -
  98-0400-0662-3  00-51115-02677-5  98-0400-0678-9  00-51115-02687-4
  98-0400-0679-7  00-51115-02688-1  98-0400-0710-0  00-51115-03261-5
  98-0400-0722-5  00-51115-03270-7  98-0400-0759-7  00-51115-03303-2
  98-0400-0760-5  00-51115-03304-9  98-0400-0809-0  00-51115-03334-6
  98-0400-0925-4  00-51115-03766-5  98-0400-0941-1  00-51115-03773-3
  98-0400-0976-7  00-51115-03784-9  98-0400-0987-4  00-51115-03790-0
  98-0400-1046-8  00-51115-03830-3  98-0400-1141-7  00-51115-03860-0
-----------------------------------------------------------------------------
Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately

MSDS: NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
November 19, 1999                                                     PAGE  3
                                                                             
-----------------------------------------------------------------------------
HEADING     (continued)
-----------------------------------------------------------------------------
                                                                             
  98-0400-1157-3  00-51115-03874-7  98-0400-1249-8  00-51115-03928-7
  98-0400-1266-2  00-51115-03940-9  98-0400-1580-6  00-51115-04399-4
  98-0400-1762-0  00-51115-04452-6  98-0400-1763-8  00-51115-04453-3
  98-0400-1775-2  00-51115-04459-5  98-0400-1892-5  00-51115-04563-9
  98-0400-1947-7  00-51115-04975-0  98-0400-2047-5  00-51115-05033-6
  98-0400-2063-2  00-51115-05042-8  98-0400-2088-9  00-51115-07136-2
  98-0400-2092-1    -     -     -   98-0400-2093-9    -     -     -
  98-0400-2094-7    -     -     -   98-0400-2095-4    -     -     -
  98-0400-2096-2    -     -     -   98-0400-2097-0    -     -     -
  98-0400-2098-8    -     -     -   98-0400-2099-6    -     -     -
  98-0400-2192-9    -     -     -   98-0400-2193-7    -     -     -
  98-0400-2194-5    -     -     -   98-0400-2198-6    -     -     -
  98-0400-2199-4    -     -     -   98-0400-2200-0    -     -     -
  98-0400-2201-8    -     -     -   98-0400-2202-6    -     -     -
  98-0400-2203-4    -     -     -   98-0400-2204-2    -     -     -
  98-0400-2205-9    -     -     -   98-0400-2206-7    -     -     -
  98-0400-2211-7    -     -     -   98-0400-2212-5    -     -     -
  98-0400-2213-3    -     -     -   98-0400-2236-4  00-51115-07146-1
  98-0400-2241-4  00-51115-07151-5  98-0400-2447-7  00-51115-07262-8
  98-0400-2467-5  00-51115-07271-0  98-0400-2502-9  00-51115-07410-3
  98-0400-2572-2  00-51115-07514-8  98-0400-2611-8  00-51115-07429-5
  98-0400-2649-8  00-51115-07562-9  98-0400-2697-7  00-51125-07810-8
  98-0400-2769-4  00-51125-07885-6  98-0400-2770-2  00-51125-07886-3
  98-0400-2783-5  00-51125-07899-3  98-0400-2834-6  00-51115-08148-4
  98-0400-2835-3  00-51115-08149-1  98-0400-2848-6  00-51115-08162-0
  98-0400-2895-7  00-51115-08209-2  98-0400-2896-5  00-51115-08210-8
  98-0400-2905-4  00-51115-08219-1  98-0400-2911-2  00-51115-08225-2
  98-0400-2940-1  00-51115-08249-8  98-0400-2941-9  00-51115-08250-4
  98-0400-2985-6  00-51115-08294-8  98-0400-2986-4  00-51115-08295-5
  98-0400-2992-2  00-51115-08302-0  98-0400-2993-0  00-51115-08303-7
  98-0400-5900-2  00-51115-09648-8  98-0400-5905-1  00-51115-09653-2
  98-0400-5906-9  00-51115-09654-9  98-0400-5907-7  00-51115-09655-6
  98-0400-5908-5  00-51115-09656-3  98-0400-5909-3  00-51115-09657-0
  98-0400-5910-1  00-51115-09658-7  98-0400-5911-9  00-51115-09659-4
  98-0400-5912-7  00-51115-09660-0  98-0400-5913-5  00-51115-09661-7
  98-0400-5914-3  00-51115-09662-4  98-0400-5915-0  00-51115-09663-1
  98-0400-5916-8  00-51115-09664-8  98-0400-5917-6  00-51115-09665-5
  98-0400-5957-2  00-51115-09705-8  98-0400-5964-8  00-51115-09712-6
  98-0400-5965-5  00-51115-09713-3  98-0400-5966-3  00-51115-09714-0
  98-0400-5978-8  00-51115-09725-6
ISSUED: November 19, 1999
SUPERSEDES: August 19, 1999
DOCUMENT: 10-4844-6
                                                                             
                                                                             
                                                                             
                                                                             
                                                                             
                                                                             
                                                                             
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Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately

MSDS: NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
November 19, 1999                                                     PAGE  4
                                                                             
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  1. INGREDIENT                            C.A.S. NO.         PERCENT
-----------------------------------------------------------------------------
                                                                             
ALUMINOBOROSILICATE FIBERS..............   12788-79-3    96.5    - 99.5
ORGANIC SIZING..........................   Unknown       0.5     - 3.5
                                                                             
-----------------------------------------------------------------------------
  2. PHYSICAL DATA
-----------------------------------------------------------------------------
                                                                             
BOILING POINT:................. N/A
VAPOR PRESSURE:................ N/A
VAPOR DENSITY:................. N/A
EVAPORATION RATE:.............. N/A
SOLUBILITY IN WATER:........... 0.5-3.5% BY WEIGHT
SPECIFIC GRAVITY:.............. 2.7
PERCENT VOLATILE:.............. 0.5-3.5% BY WEIGHT
pH:............................ N/A
VISCOSITY:..................... SOLID
MELTING POINT:................. > 1800 C
                                                                             
APPEARANCE AND ODOR:
  Textile grade fibers which are equal to or greater than 7 microns in
  diameter, shiny, white, thread, yarn or fabric.
                                                                             
-----------------------------------------------------------------------------
  3. FIRE AND EXPLOSION HAZARD DATA
-----------------------------------------------------------------------------
                                                                             
FLASH POINT:................... N/A
FLAMMABLE LIMITS - LEL:........ N/A
FLAMMABLE LIMITS - UEL:........ N/A
AUTOIGNITION TEMPERATURE:...... N/D
                                                                             
EXTINGUISHING MEDIA:
  Not applicable
                                                                             
SPECIAL FIRE FIGHTING PROCEDURES:
  None known.
                                                                             
UNUSUAL FIRE AND EXPLOSION HAZARDS:
  None known.
                                                                             
NFPA HAZARD CODES:  HEALTH: 0  FIRE: 1  REACTIVITY: 0
                    UNUSUAL REACTION HAZARD: none
                                                                             
                                                                                                                                                 
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Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately

MSDS: NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
November 19, 1999                                                     PAGE  5
                                                                             
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  4. REACTIVITY DATA
-----------------------------------------------------------------------------
                                                                             
STABILITY: Stable
                                                                             
INCOMPATIBILITY - MATERIALS/CONDITIONS TO AVOID:
  None known.
                                                                             
HAZARDOUS POLYMERIZATION: Hazardous polymerization will not occur.
                                                                             
HAZARDOUS DECOMPOSITION PRODUCTS:
  Carbon monoxide, formic acid and trace amounts of other substances.
                                                                             
-----------------------------------------------------------------------------
  5. ENVIRONMENTAL INFORMATION
-----------------------------------------------------------------------------
                                                                             
SPILL RESPONSE:
  Observe precautions from other sections.
                                                                             
RECOMMENDED DISPOSAL:
  Dispose of waste product in a sanitary landfill.  Reclaim if
  feasible.
                                                                             
ENVIRONMENTAL DATA:
  Not determined.
                                                                             
REGULATORY INFORMATION:
  Volatile Organic Compounds: N/D.
  VOC Less H2O & Exempt Solvents: N/D.
                                                                             
  Since regulations vary, consult applicable regulations or authorities
  before disposal.  U.S. EPA Hazardous Waste Number =  None (Not U.S.
  EPA Hazardous).
                                                                             
EPCRA HAZARD CLASS:
 FIRE HAZARD: No  PRESSURE: No  REACTIVITY: No  ACUTE: Yes  CHRONIC: No
                                                                             
-----------------------------------------------------------------------------
  6. SUGGESTED FIRST AID
-----------------------------------------------------------------------------
                                                                             
EYE CONTACT:
  Immediately flush eyes with large amounts of water. Get immediate
  medical attention.
                                                                             
SKIN CONTACT:
  Flush skin with large amounts of water. If irritation persists, get
  medical attention.
                                                                             
                                                                             
                                                                             
                                                                             
-----------------------------------------------------------------------------
Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately

MSDS: NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
November 19, 1999                                                     PAGE  6
                                                                             
-----------------------------------------------------------------------------
  6. SUGGESTED FIRST AID     (continued)
-----------------------------------------------------------------------------
                                                                             
INHALATION:
  If signs/symptoms occur, remove person to fresh air. If
  signs/symptoms continue, call a physician.
                                                                             
IF SWALLOWED:
  No need for first aid is anticipated.
                                                                             
-----------------------------------------------------------------------------
  7. PRECAUTIONARY INFORMATION
-----------------------------------------------------------------------------
                                                                             
EYE PROTECTION:
  Avoid eye contact.  Wear safety glasses with side shields.
                                                                             
SKIN PROTECTION:
  Avoid prolonged or repeated skin contact.  Wear appropriate gloves
  when handling this material.  Use one or more of the following
  personal protection items as necessary to prevent skin contact:
  coveralls.
                                                                             
RECOMMENDED VENTILATION:
  Provide appropriate local exhaust when product is heated.  Use in a
  well-ventilated area.  Provide sufficient ventilation to maintain
  emissions below recommended exposure limits.  If exhaust ventilation
  is not adequate, use appropriate respiratory protection.
                                                                             
RESPIRATORY PROTECTION:
  Avoid breathing of airborne material.  Avoid breathing of thermal
  decomposition products.  Select one of the following NIOSH approved
  respirators based on airborne concentration of contaminants and in
  accordance with OSHA regulations:  half-mask dust respirator, full-
  face dust respirator.
                                                                             
PREVENTION OF ACCIDENTAL INGESTION:
  Do not ingest.
                                                                             
RECOMMENDED STORAGE:
  Keep out of the reach of children.
                                                                             
FIRE AND EXPLOSION AVOIDANCE:
  Not applicable.
                                                                             
                                                                             
                                EXPOSURE LIMITS
                                                                             
INGREDIENT                               VALUE  UNIT       TYPE   AUTH  SKIN*
-----------------------------------------------------------------------------
ALUMINOBOROSILICATE FIBERS...........    1.0    FIBER/CC   TWA    OSHA
                                           PROPOSED
                                           REFRACTORY CERAMIC FIBERS
-----------------------------------------------------------------------------
Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately

MSDS: NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
November 19, 1999                                                     PAGE  7
                                                                             
                       EXPOSURE LIMITS     (continued)
                                                                             
INGREDIENT                               VALUE  UNIT       TYPE   AUTH  SKIN*
-----------------------------------------------------------------------------
ALUMINOBOROSILICATE FIBERS...........    1.0    FIBER/CC   TWA    CMRG
                                           REFRACTORY CERAMIC FIBERS
ORGANIC SIZING.......................    NONE   NONE       NONE   NONE
                                                                             
* SKIN NOTATION:  Listed substances indicated with 'Y' under SKIN refer to
the potential contribution to the overall exposure by the cutaneous route
including mucous membrane and eye, either by airborne or, more particularly,
by direct contact with the substance.  Vehicles can alter skin absorption.
                                                                             
SOURCE OF EXPOSURE LIMIT DATA:
- CMRG:  Chemical Manufacturer Recommended Exposure Guidelines
- OSHA:  Occupational Safety and Health Administration
                                                                             
- NONE:  None Established
                                                                             
-----------------------------------------------------------------------------
  8. HEALTH HAZARD DATA
-----------------------------------------------------------------------------
                                                                             
EYE CONTACT:
  Mechanical eye irritation: signs/symptoms can include irritation,
  redness, scratching of the cornea and tearing.
                                                                             
SKIN CONTACT:
  Mechanical skin irritation: signs/symptoms can include itching and
  redness.
                                                                             
INHALATION:
  Irritation (upper respiratory): signs/symptoms can include soreness
  of the nose and throat, coughing and sneezing.
                                                                             
  Vapors of heated material may cause respiratory system irritation.
                                                                             
IF SWALLOWED:
  Ingestion is not a likely route of exposure to this product.
                                                                             
  Irritation of Gastrointestinal Tissues: signs/symptoms can include
  pain, vomiting, abdominal tenderness, nausea, blood in vomitus, and
  blood in feces.
                                                                             
OTHER HEALTH HAZARD INFORMATION:
  Due to their large size (7-13 microns in diameter), these Nextel (TM)
  Ceramic Fibers are considered non-respirable and therefore are not
  expected to pose a cancer risk. Fibers are defined as respirable by
  WHO convention if the length is larger than 5 microns and the
  diameter is less than 3 microns with a length to diameter ratio
  greater than 3:1.
                                                                             
                                                                             
                                                                             
-----------------------------------------------------------------------------
Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately

MSDS: NEXTEL(tm) 312 CERAMIC FIBER WITH 299 or 399 SIZING
November 19, 1999                                                     PAGE  8
                                                                             
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SECTION CHANGE DATES
-----------------------------------------------------------------------------
                                                                             
HEADING             SECTION CHANGED SINCE August 19, 1999    ISSUE
INGREDIENTS         SECTION CHANGED SINCE August 19, 1999    ISSUE
REACTIVITY DATA     SECTION CHANGED SINCE August 19, 1999    ISSUE
HEALTH HAZARD DATA  SECTION CHANGED SINCE August 19, 1999    ISSUE
                                                                             
                                                                                                                                                  
-----------------------------------------------------------------------------
Abbreviations: N/D - Not Determined  N/A - Not Applicable  CA - Approximately
                                                                             
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The information in this Material Safety Data Sheet (MSDS) is believed to
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