| Common Name: | FOOD GRADE SILICONE (AEROSOL) 03040 |
| Manufacturer: | CRC |
| SDS Revision Date: | 12/21/2011 |
| SDS Format: | No Format Specified |
| Item Number(s): | 2F130, 3EED7 |
| Manufacturer Model Number(s): |
SDS Table of Contents
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CRC(R*)
MATERIAL SAFETY DATA SHEET
| SECTION 1: PRODUCT & COMPANY IDENTIFICATION |  |
PRODUCT NAME: FOOD GRADE SILICONE (AEROSOL)
PRODUCT NUMBER(S): 03040
PRODUCT USE: SILICONE-BASED MULTI-PURPOSE LUBRICANT
MANUFACTURER / SUPPLIER CONTACT INFORMATION:
IN UNITED STATES:
CRC INDUSTRIES, INC.
885 LOUIS DRIVE
WARMINSTER, PA 18974
WWW.CRCINDUSTRIES.COM
1-215-674-4300 (GENERAL)
(800) 521-3168 (TECHNICAL)
(800) 272-4620 (CUSTOMER SERVICE)
IN CANADA:
CRC CANADA CO.
2-1246 LORIMAR DRIVE
MISSISSAUGA, ONTARIO L5S 1R2
WWW.CRC-CANADA.CA
1-905-670-2291
IN MEXICO:
CRC INDUSTRIES MEXICO
AV. BENITO JUAREZ 4055 G
COLONIA ORQUIDEA
SAN LUIS POTOSI, SLP CP 78394
WWW.CRC-MEXICO.COM
52-444-824-1666
24-HR EMERGENCY - CHEMTREC: (800) 424-9300 OR (703) 527-3887
| SECTION 2: HAZARDS IDENTIFICATION | |
EMERGENCY OVERVIEW:
DANGER:
EXTREMELY FLAMMABLE. HARMFUL OR FATAL IF SWALLOWED. CONTENTS UNDER PRESSURE.
APPEARANCE & ODOR: CLEAR, WATER-WHITE LIQUID WITH MILD SOLVENT ODOR
POTENTIAL HEALTH EFFECTS:
ACUTE EFFECTS:
EYE:
MAY CAUSE MILD IRRITATION INCLUDING STINGING AND REDNESS, BUT DOES NOT
INJURE EYE.
SKIN:
SINGLE, BRIEF EXPOSURES MAY CAUSE MILD IRRITATION. FREQUENT OR PROLONGED
CONTACT MAY CAUSE MORE SEVERE IRRITATION, DEFATTING OF THE SKIN, AND
DERMATITIS.
INHALATION:
HIGH VAPOR CONCENTRATIONS ARE IRRITATING TO THE RESPIRATORY TRACT AND MAY
CAUSE HEADACHES, DIZZINESS, ANESTHESIA, DROWSINESS, UNCONSCIOUSNESS AND
OTHER CENTRAL NERVOUS SYSTEM EFFECTS, INCLUDING DEATH. MAY CAUSE PERIPHERAL
NERVOUS SYSTEM DISORDER AND/OR DAMAGE.
INGESTION:
LOW ORDER OF TOXICITY BY INGESTION. MAIN HAZARD IS ASPIRATION INTO THE LUNGS
DURING SWALLOWING OR VOMITING. SMALL AMOUNTS ASPIRATED INTO THE RESPIRATORY
SYSTEM MAY CAUSE BRONCHOPNEUMONIA OR PULMONARY ADEMA, POSSIBLY PROGRESSING
TO DEATH.
CHRONIC EFFECTS:
OVEREXPOSURE TO n-HEXANE MAY CAUSE PROGRESSIVE AND POTENTIALLY IRREVERSIBLE
DAMAGE TO THE PERIPHERAL NERVOUS SYSTEM, PARTICULARLY IN THE ARMS AND LEGS.
TARGET ORGANS:
CENTRAL NERVOUS SYSTEM, PERIPHERAL NERVOUS SYSTEM, RESPIRATORY SYSTEM
MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: SKIN AND RESPIRATORY CONDITIONS
SEE SECTION 11 FOR TOXICOLOGY AND CARCINOGENICITY INFORMATION ON PRODUCT
INGREDIENTS.
| SECTION 3: COMPOSITION/INFORMATION ON INGREDIENTS | |
COMPONENT CAS NUMBER % BY WT.
HEXANE ISOMERS 64742-49-0 55 - 65
107-83-5
n-HEXANE 110-54-3 <2
DIMETHYLPOLYSILOXANE 63148-62-9 2 - 5
1,1-DIFLUOROETHANE (HFC-152A) 75-37-6 30 - 40
| SECTION 4: FIRST AID MEASURES | |
EYE CONTACT:
IMMEDIATELY FLUSH WITH PLENTY OF WATER FOR 15 MINUTES. CALL A PHYSICIAN IF
IRRITATION PERSISTS.
SKIN CONTACT:
REMOVE CONTAMINATED CLOTHING AND WASH AFFECTED AREA WITH SOAP AND WATER.
CALL A PHYSICIAN IF IRRITATION PERSISTS. WASH CONTAMINATED CLOTHING PRIOR TO
RE-USE.
INHALATION:
REMOVE PERSON TO FRESH AIR. KEEP PERSON CALM. IF NOT BREATHING, GIVE
ARTIFICIAL RESPIRATION. IF BREATHING IS DIFFICULT GIVE OXYGEN. CALL A
PHYSICIAN.
INGESTION: DO NOT INDUCE VOMITING. CONTACT A PHYSICIAN IMMEDIATELY.
NOTE TO PHYSICIANS:
TREAT SYMPTOMATICALLY. GASTRIC LAVAGE USING A CUFFED ENDOTRACHEAL TUBE MAY
BE PERFORMED AT YOUR DISCRETION.
| SECTION 5: FIRE-FIGHTING MEASURES | |
FLAMMABLE PROPERTIES:
THIS PRODUCT IS EXTREMELY FLAMMABLE IN ACCORDANCE WITH AEROSOL FLAMMABILITY
DEFINITIONS. (SEE 16 CFR 1500.3(C)(6)).
FLASH POINT: <0 DEG. F / -17 DEG. C (TCC)
AUTOIGNITION TEMPERATURE: 489 DEG. F / 254 DEG. C
UPPER EXPLOSIVE LIMIT: 9.0
LOWER EXPLOSIVE LIMIT: 1.7
FIRE AND EXPLOSION DATA:
SUITABLE EXTINGUISHING MEDIA:
CLASS B FIRE EXTINGUISHERS, DRY CHEMICAL, FOAM OR CO2
PRODUCTS OF COMBUSTION: FUMES, SMOKE AND CARBON MONOXIDE
EXPLOSION HAZARDS:
AEROSOL CONTAINERS, WHEN EXPOSED TO HEAT FROM FIRE, MAY BUILD PRESSURE AND
EXPLODE. VAPORS MAY ACCUMULATE IN A CONFINED SPACE AND CREATE A FLAMMABLE
ATMOSPHERE.
PROTECTION OF FIRE-FIGHTERS:
FIREFIGHTERS SHOULD WEAR SELF-CONTAINED, NIOSH-APPROVED BREATHING APPARATUS
FOR PROTECTION AGAINST SUFFOCATION AND POSSIBLE TOXIC DECOMPOSITION
PRODUCTS.PROPER EYE AND SKIN PROTECTION SHOULD BE PROVIDED. USE WATER SPRAY
TO KEEP FIRE-EXPOSED CONTAINERS COOL AND TO KNOCK DOWN VAPORS WHICH MAY
RESULT FROM PRODUCT DECOMPOSITION. DO NOT SPRAY DIRECTLY ON FIRE; PRODUCT
WILL FLOAT AND COULD BE REIGNITED ON SURFACE OF WATER.
| SECTION 6: ACCIDENTAL RELEASE MEASURES | |
PERSONAL PRECAUTIONS: USE PERSONAL PROTECTION RECOMMENDED IN SECTION 8.
ENVIRONMENTAL PRECAUTIONS:
TAKE PRECAUTIONS TO PREVENT CONTAMINATION OF GROUND AND SURFACE WATERS.
DO NOT FLUSH INTO SEWERS OR STORM DRAINS.
METHODS FOR CONTAINMENT & CLEAN-UP:
DIKE AREA TO CONTAIN SPILL. REMOVE ALL SOURCES OF IGNITION. VENTILATE THE
AREA WITH FRESH AIR. IF IN CONFINED SPACE OR LIMITED AIR CIRCULATION AREA,
CLEAN-UP WORKERS SHOULD WEAR APPROPRIATE RESPIRATORY PROTECTION. RECOVER OR
ABSORB SPILLED MATERIAL USING AN ABSORBENT DESIGNED FOR CHEMICAL SPILLS.
PLACE USED ABSORBENTS INTO PROPER WASTE CONTAINERS.
| SECTION 7: HANDLING AND STORAGE | |
HANDLING PROCEDURES:
USE PROPER GROUNDING AND BONDING PROCEDURES FOR TRANSFERRING MATERIALS. DO
NOT USE PRODUCT NEAR ANY SOURCE OF IGNITION. AVOID CONTACT WITH EYES AND
SKIN.AVOID BREATHING VAPORS. USE CAUTION AROUND ENERGIZED EQUIPMENT. THE
METAL CONTAINER WILL CONDUCT ELECTRICITY IF IT CONTACTS A LIVE SOURCE. THIS
MAY RESULT IN INJURY TO THE USER FROM ELECTRICAL SHOCK AND/OR FLASH FIRE.
FOR PRODUCT USE INSTRUCTIONS, PLEASE SEE THE PRODUCT LABEL.
STORAGE PROCEDURES:
STORE IN A COOL DRY AREA OUT OF DIRECT SUNLIGHT. AEROSOL CANS MUST BE
MAINTAINED BELOW 120 DEG. F / 49 DEG. C TO PREVENT CANS FROM RUPTURING.
AEROSOL STORAGE LEVEL: III
| SECTION 8: EXPOSURE CONTROLS/PERSONAL PROTECTION | |
EXPOSURE GUIDELINES:
COMPONENT OSHA ACGIH OTHER UNIT
TWA STEL TWA STEL TWA SOURCE
HEXANE ISOMERS 500(V) 1000(V) 500 1000 NE PPM
n-HEXANE 500 NE 50(S) NE NE PPM
DIMETHYLPOLYSILOXANE NE NE NE NE NE
1,1-DIFLUOROETHANE NE NE NE NE 1000 AIHA PPM
N.E. - NOT ESTABLISHED
(C) - CEILING
(S) - SKIN
(V) - VACATED
CONTROLS AND PROTECTION:
ENGINEERING CONTROLS:
AREA SHOULD HAVE VENTILATION TO PROVIDE FRESH AIR. LOCAL EXHAUST VENTILATION
IS GENERALLY PREFERRED BECAUSE IT CAN CONTROL THE EMISSIONS OF THE
CONTAMINANT AT THE SOURCE, PREVENTING DISPERSION INTO THE GENERAL WORK AREA.
USE MECHANICAL MEANS IF NECESSARY TO MAINTAIN VAPOR LEVELS BELOW THE
EXPOSURE GUIDELINES. IF WORKING IN A CONFINED SPACE, FOLLOW APPLICABLE OSHA
REGULATIONS.
RESPIRATORY PROTECTION:
NONE REQUIRED FOR NORMAL WORK WHERE ADEQUATE VENTILATION IS PROVIDED. IF
ENGINEERING CONTROLS ARE NOT FEASIBLE OR IF EXPOSURE EXCEEDS THE APPLICABLE
EXPOSURE LIMITS, USE A NIOSH-APPROVED CARTRIDGE RESPIRATOR WITH ORGANIC
VAPOR CARTRIDGE. AIR MONITORING IS NEEDED TO DETERMINE ACTUAL EMPLOYEE
EXPOSURE LEVELS. USE A SELF-CONTAINED BREATHING APPARATUS IN CONFINED SPACES
AND FOR EMERGENCIES.
EYE/FACE PROTECTION:
FOR NORMAL CONDITIONS, WEAR SAFETY GLASSES. WHERE THERE IS REASONABLE
PROBABILITY OF LIQUID CONTACT, WEAR SPLASH-PROOF GOGGLES.
SKIN PROTECTION:
USE PROTECTIVE GLOVES SUCH AS NITRILE, PVC OR VITON(R*). ALSO, USE FULL
PROTECTIVE CLOTHING IF THERE IS PROLONGED OR REPEATED CONTACT OF LIQUID WITH
SKIN.
| SECTION 9: PHYSICAL AND CHEMICAL PROPERTIES | |
PHYSICAL STATE: LIQUID
COLOR: CLEAR, WATER-WHITE
ODOR: MILD SOLVENT
ODOR THRESHOLD: ND
SPECIFIC GRAVITY: 0.6663
INITIAL BOILING POINT: 140 DEG. F / 60 DEG. C
FREEZING POINT: <-76 DEG. F / -60 DEG. C
VAPOR PRESSURE: 160 MMHg @ 68 DEG. F / 20 DEG. C
VAPOR DENSITY: >1 (AIR = 1)
EVAPORATION RATE: FAST
SOLUBILITY: NEGLIGIBLE IN WATER
COEFFICIENT OF WATER/OIL DISTRIBUTION: ND
pH: NA
VOLATILE ORGANIC COMPOUNDS:
WT %: 60.0
G/L: 399.8
LBS./GAL: 3.33
| SECTION 10: STABILITY AND REACTIVITY | |
STABILITY: STABLE
CONDITIONS TO AVOID: SOURCES OF IGNITION, TEMPERATURE EXTREMES
INCOMPATIBLE MATERIALS: STRONG OXIDIZERS
HAZARDOUS DECOMPOSITION PRODUCTS: OXIDES OF CARBON
POSSIBILITY OF HAZARDOUS REACTIONS: NO
| SECTION 11: TOXICOLOGICAL INFORMATION | |
LONG-TERM TOXICOLOGICAL STUDIES HAVE NOT BEEN CONDUCTED FOR THIS PRODUCT.
THE FOLLOWING INFORMATION IS AVAILABLE FOR COMPONENTS OF THIS PRODUCT.
ACUTE TOXICITY:
COMPONENT ORAL LD50 DERMAL LD50 (RABBIT) INHALATION LC50
(RAT) (RAT)
HEXANE ISOMERS >5,000 MG/KG >2000 MG/KG NO DATA
n-HEXANE 28,710 MG/KG 3000 MG/KG 48,000 PPM/4H
DIMETHYLPOLY- NO DATA NO DATA NO DATA
SILOXANE
1,1-DIFLUOROETHANE NO DATA NO DATA 25 PPM/30M
CHRONIC TOXICITY:
COMPONENT OSHA IARC NTP IRRITANT SENSITIZER
CARCINOGEN CARCINOGEN CARCINOGEN
HEXANE NO NO NO E & S (MILD) UNKNOWN
ISOMERS
n-HEXANE NO NO NO E, S & R (MODERATE) UNKNOWN
DIMETHYL- NO NO NO E (MILD) UNKNOWN
POLY-
SILOXANE
1,1- NO NO NO NO UNKNOWN
DIFLUORO-
ETHANE
E - EYE
S - SKIN
R - RESPIRATORY
REPRODUCTIVE TOXICITY: NO INFORMATION AVAILABLE
TERATOGENICITY: NO INFORMATION AVAILABLE
MUTAGENICITY: NO INFORMATION AVAILABLE
SYNERGISTIC EFFECTS: NO INFORMATION AVAILABLE
| SECTION 12: ECOLOGICAL INFORMATION | |
ECOLOGICAL STUDIES HAVE NOT BEEN CONDUCTED FOR THIS PRODUCT. THE FOLLOWING
INFORMATION IS AVAILABLE FOR COMPONENTS OF THIS PRODUCT.
ECOTOXICITY:
n-HEXANE:
48 HR EC50 WATER FLEA: 3.87 MG/L
96 HR LC50 LEPOMIS MACROCHIRUS: 4.12 MG/L
PERSISTENCE / DEGRADABILITY: NO INFORMATION AVAILABLE
BIOACCUMULATION / ACCUMULATION: NO INFORMATION AVAILABLE
MOBILITY IN ENVIRONMENT: NO INFORMATION AVAILABLE
| SECTION 13: DISPOSAL CONSIDERATIONS | |
WASTE CLASSIFICATION:
THE DISPENSED LIQUID PRODUCT IS A RCRA HAZARDOUS WASTE FOR THE
CHARACTERISTIC OF IGNITABILITY WITH A WASTE CODE OF D001
(SEE 40 CFR PART 261.20 - 261.33).EMPTY AEROSOL CONTAINERS MAY BE RECYCLED.
ANY LIQUID PRODUCT SHOULD BE MANAGED AS A HAZARDOUS WASTE.
ALL DISPOSAL ACTIVITIES MUST COMPLY WITH FEDERAL, STATE, PROVINCIAL AND
LOCAL REGULATIONS. LOCAL REGULATIONS MAY BE MORE STRINGENT THAN STATE,
PROVINCIAL OR NATIONAL REQUIREMENTS.
| SECTION 14: TRANSPORT INFORMATION | |
US DOT (GROUND): CONSUMER COMMODITY, ORM-D
ICAO/IATA (AIR): CONSUMER COMMODITY, ID8000, 9
IMO/IMDG (WATER): AEROSOLS, UN1950, 2.1, LIMITED QUANTITY
SPECIAL PROVISIONS: NONE
| SECTION 15: REGULATORY INFORMATION | |
U.S. FEDERAL REGULATIONS:
TOXIC SUBSTANCES CONTROL ACT (TSCA):
ALL INGREDIENTS ARE EITHER LISTED ON THE TSCA INVENTORY OR ARE EXEMPT.
COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION AND LIABILITY ACT
(CERCLA):
REPORTABLE QUANTITIES (RQ'S) EXIST FOR THE FOLLOWING INGREDIENTS:
n-HEXANE (5000 LBS)
SPILLS OR RELEASES RESULTING IN THE LOSS OF ANY INGREDIENT AT OR ABOVE ITS
RQ REQUIRE IMMEDIATE NOTIFICATION TO THE NATIONAL RESPONSE CENTER
(800-424-8802) AND TO YOUR LOCAL EMERGENCY PLANNING COMMITTEE.
SUPERFUND AMENDMENTS REAUTHORIZATION ACT (SARA) TITLE III:
SECTION 302 EXTREMELY HAZARDOUS SUBSTANCES (EHS): NONE
SECTION 311/312 HAZARD CATEGORIES:
FIRE HAZARD: YES
REACTIVE HAZARD: NO
RELEASE OF PRESSURE: YES
ACUTE HEALTH HAZARD: YES
CHRONIC HEALTH HAZARD: YES
SECTION 313 TOXIC CHEMICALS:
THIS PRODUCT CONTAINS THE FOLLOWING SUBSTANCES SUBJECT TO THE REPORTING
REQUIREMENTS OF SECTION 313 OF TITLE III OF THE SUPERFUND AMENDMENTS AND
REAUTHORIZATION ACT OF 1986 AND 40 CFR PART 372: n-HEXANE (1.8%)
CLEAN AIR ACT:
SECTION 112 HAZARDOUS AIR POLLUTANTS (HAPS): n-HEXANE
OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION:
THIS PRODUCT IS REGULATED BY THE HAZARD COMMUNICATIONS STANDARD.
U.S. STATE REGULATIONS:
CALIFORNIA SAFE DRINKING WATER AND TOXIC ENFORCEMENT ACT (PROP 65):
THIS PRODUCT MAY CONTAIN THE FOLLOWING CHEMICALS KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM: NONE
CONSUMER PRODUCTS VOC REGULATIONS:
THIS PRODUCT IS COMPLIANT AS A SILICONE-BASED MULTI-PURPOSE LUBRICANT.
STATE RIGHT TO KNOW:
NEW JERSEY: 75-83-2, 109-66-0, 78-78-4, 96-37-7, 110-54-3, 79-29-8, 75-37-6
PENNSYLVANIA: 107-83-5, 75-83-2, 110-54-3, 79-29-8, 75-37-6
MASSACHUSETTS: 107-83-5, 75-83-2, 110-54-3, 79-29-8, 75-37-6
RHODE ISLAND: 110-54-3, 75-37-6
CANADIAN REGULATIONS:
CONTROLLED PRODUCTS REGULATIONS:
THIS PRODUCT HAS BEEN CLASSIFIED IN ACCORDANCE WITH THE HAZARD CRITERIA OF
THE CONTROLLED PRODUCTS REGULATIONS AND THE MSDS CONTAINS ALL THE
INFORMATION REQUIRED BY THE CONTROLLED PRODUCTS REGULATIONS.
WHMIS HAZARD CLASS:
A
B5
D2A
D2B
CANADIAN DSL INVENTORY:
ALL INGREDIENTS ARE EITHER LISTED ON THE DSL INVENTORY OR ARE EXEMPT.
EUROPEAN UNION REGULATIONS:
ROHS COMPLIANCE:
THIS PRODUCT IS COMPLIANT WITH DIRECTIVE 2002/95/EC OF THE EUROPEAN
PARLIAMENT AND OF THE COUNCIL OF 27 JANUARY 2003. THIS PRODUCT DOES NOT
CONTAIN ANY OF THE RESTRICTED SUBSTANCES AS LISTED IN ARTICLE 4(1) OF THE
ROHS DIRECTIVE.
ADDITIONAL REGULATORY INFORMATION: NONE
| SECTION 16: OTHER INFORMATION | |
HMIS(R*) (II):
HEALTH 1
FLAMMABILITY 3
REACTIVITY 0
PPE B
NFPA:
1
3
0
RATINGS RANGE FROM 0 (NO HAZARD) TO 4 (SEVERE HAZARD)
PREPARED BY: MICHELLE RUDNICK
CRC #: 519E/F
REVISION DATE: 12/21/2011
CHANGES SINCE LAST REVISION:
SECTION 15: WHMIS HAZARD CLASS
THE INFORMATION CONTAINED IN THIS DOCUMENT APPLIES TO THIS SPECIFIC MATERIAL
AS SUPPLIED. IT MAY NOT BE VALID FOR THIS MATERIAL IF IT IS USED IN
COMBINATION WITH ANY OTHER MATERIALS. THIS INFORMATION IS ACCURATE TO THE
BEST OF CRC INDUSTRIES' KNOWLEDGE OR OBTAINED FROM SOURCES BELIEVED BY CRC
TO BE ACCURATE. BEFORE USING ANY PRODUCT, READ ALL WARNINGS AND DIRECTIONS
ON THE LABEL. FOR FURTHER CLARIFICATION OF ANY INFORMATION CONTAINED ON THIS
MSDS CONSULT YOUR SUPERVISOR, A HEALTH & SAFETY PROFESSIONAL, OR CRC
INDUSTRIES.
ACGIH: AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGIENISTS
CAS: CHEMICAL ABSTRACT SERVICE
CFR: CODE OF FEDERAL REGULATIONS
DOT: DEPARTMENT OF TRANSPORTATION
DSL: DOMESTIC SUBSTANCE LIST
G/L: GRAMS PER LITER
HMIS: HAZARDOUS MATERIALS IDENTIFICATION SYSTEM
IARC: INTERNATIONAL AGENCY FOR RESEARCH ON CANCER
IATA: INTERNATIONAL AIR TRANSPORT ASSOCIATION
ICAO: INTERNATIONAL CIVIL AVIATION ORGANIZATION
IMDG: INTERNATIONAL MARITIME DANGEROUS GOODS
IMO: INTERNATIONAL MARITIME ORGANIZATION
LBS./GAL: POUNDS PER GALLON
LC: LETHAL CONCENTRATION
LD: LETHAL DOSE
NA: NOT APPLICABLE
ND: NOT DETERMINED
NIOSH: NATIONAL INSTITUTE OF OCCUPATIONAL SAFETY & HEALTH
NFPA: NATIONAL FIRE PROTECTION ASSOCIATION
NTP: NATIONAL TOXICOLOGY PROGRAM
OSHA: OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION
PMCC: PENSKY-MARTENS CLOSED CUP
PPE: PERSONAL PROTECTION EQUIPMENT
PPM: PARTS PER MILLION
ROHS: RESTRICTION OF HAZARDOUS SUBSTANCES
STEL: SHORT TERM EXPOSURE LIMIT
TCC: TAG CLOSED CUP
TWA: TIME WEIGHTED AVERAGE
WHMIS: WORKPLACE HAZARDOUS MATERIALS INFORMATION SYSTEM