Product ID:SYLOID SILICAS ID/AEROGEL GRADES, 235
MSDS Date:01/01/1990
FSC:9620
NIIN:00N028250
MSDS Number: BMVMG

Emergency Phone: 301-659-9000;301-874-2009

Info Phone: 301-659-9000;301-659-9058

Preparer: J.H. CONVEY

Cage: 16210

Telephone: 410-659-9000

Cage: 16210

SILICA GEL; (SYNTHETIC AMORPHOUS SILICA)

CAS: 63231-67-4

RTECS: VV7322000

Fraction By Weight: 99.4%

OSHA PEL 6 MG/M3

ACGIH TLV: 10 MG/M3

LD50 LC50 Mixture:LD50:(ORAL,RAT)EST. >31,600 MG/KG.
Routes of Entry: Inhalation:YES Skin:NO Ingestion:YES
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:SILICA GEL IS A SYNTHETIC AMORPHOUS
SILICA NOT TO BE CONFUSED W/CRYSTALLINE SILICA. EPIDEMIOLOGICAL
STUDIES INDICATE LOW POTENTIAL FOR ADVERSE HEALTH EFFECTS. SILICA
GEL IS CONSIDERED BY DAVISON TO BE A NUISANCE DUST. IN ACTIVATED
FORM, SILICA GEL ACTS AS A DESICCANT & CAN CAUSE A DRYING
IRRITATION OF (EFTS OF OVEREXP)
Explanation of Carcinogenicity:NOT RELEVANT
Effects of Overexposure:HLTH HAZ:MUCOUS MEMBRANES & SKIN IN CASES OF
SEVERE EXPOSURE. NOT CONSIDERED AN OCULAR IRRITANT. IN ANIMAL TESTS
AN 18 MONTH EXPOSURE AT 15 MG/M3 SHOWED SILICA DEPOSITION IN
RESPIRATORY MACROPHAGES & LYMPH NODES, MINIMUM LUNG FUNCTION
IMPAIRMENT AND NO SILICOSIS.
Medical Cond Aggravated by Exposure:NO MEDICAL CONDITIONS ABNORMALLY
AGGRAVATED BY EXPOSURE TO THIS PRODUCT.

First Aid:EYE:IMMEDIATELY WASH W/LARGE AMOUNTS OF WATER FOR AT LEAST 15
MINUTES, OCCASIONALLY LIFTING LIDS. IF IRRITATION OCCURS &
PERSISTS, GET MD. SKIN:WASH W/SOAP & WATER. INGEST:MATERIAL WILL
PASS THROUGH T HE BODY NORMALLY. INHAL:REMOVE TO FRESHAIR.

Extinguishing Media:NON-FLAMMABLE. USE MEDIA SUITABLE FOR SURROUNDING
FIRE .
Fire Fighting Procedures:WEAR NIOSH/MSHA APPROVED SCBA AND FULL
PROTECTIVE EQUIPMENT .
Unusual Fire/Explosion Hazard:NONE SPECIFIED BY MANUFACTURER.

Spill Release Procedures:NOT KNOWN TO HAVE ANY ADVERSE EFFECT ON THE
AQUATIC ENVIRONMENT. THEY ARE INSOLUBLE AND NON-TOXIC. SWEEP OR
VACUUM UP OR FLUSH TO SEWER.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:WHEN POURING INTO CNTNR OF FLAMMABLE
LIQUID, GROUND BOTH CNTNRS ELECTRICALLY TO PREVENT STATIC ELECTRIC
SPARK.KEEP TIGHTLY SEALED TO PROTECT QUALITY.
Other Precautions:AVOID PRLNGD BRTHG OF DUST/CNTCT OF DUST W/SKIN.
DRYING ACTION CAN CAUSE IRRIT OF MUCOUS MEMBRANES OF NOSE & THROAT
& IRRIT OF SKIN. IF USE REQUIRES MANUAL HANDLING, WEAR LONG SLEEVES
& CLOSE-WEAVE CO TTON GLOVES W/TIGHT-FITTING (SUPP DATA)

Respiratory Protection:IF DUSTY CONDITIONS PREVAIL, WEAR PROPERLY
FITTED NIOSH/MSHA APPROVED DUST RESPIRATOR.
Ventilation:NONE SPECIFIED BY MANUFACTURER.
Protective Gloves:CLOSE-WEAVE COTTON GLOVES (SUPP DATA)
Eye Protection:CHEMICAL WORKERS GOGGLES .
Other Protective Equipment:LONG SLEEVES.
Work Hygienic Practices:NONE SPECIFIED BY MANUFACTURER.
Supplemental Safety and Health
PH:5% SLURRY: 6-8. OTHER PREC:WRISTLETS. PROT GLOVES:W/TIGHT-FITTING
WRISTLETS.

HCC:N1
Spec Gravity:2.1
pH:SUPDAT
Solubility in Water:INSOLUBLE
Appearance and Odor:DRY WHITE POWDER, AVERAGE PARTICLE SIZE 2.5-15
MICRONS, NO ODOR.

Stability Indicator/Materials to Avoid:YES
REACTS WITH HYDROGEN FLUORIDE.
Stability Condition to Avoid:NONE SPECIFIED BY MANUFACTURER.
Hazardous Decomposition Products:NONE SPECIFIED BY MANUFACTURER.

Waste Disposal Methods:DISPOSE IN AN APPROVED LANDFILL I/A/W FEDERAL,
STATE AND LOCAL REGULATIONS. COVER PROMPTLY TO AVOID BLOWING OF
DUST.

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This information is formulated for use by elements of the Department
of Defense. The United States of America in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. Any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.