MSDS Name:Benzyl chloroformate 50 wt% solution in toluene
Synonym:Carbobenzoxy chloride; Carbonochloride acid benzylester

EMERGENCY OVERVIEW
Highly flammable. Causes burns. Harmful by inhalation. Possible risk of harm to the unborn child. Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. Vapours may cause drowsiness and dizziness.Moisture sensitive.Lachrymator (substance which increases the flow of tears).
Potential Health Effects
Eye:
Causes eye burns. Lachrymator (substance which increases the flow of tears).
Skin:
Causes skin burns.
Ingestion:
Aspiration hazard. May cause effects similar to those for inhalation exposure. Aspiration of material into the lungs may cause chemical pneumonitis, which may be fatal. May be harmful if swallowed. Causes digestive tract irritation with possible burns.
Inhalation:
May cause liver and kidney damage. May cause cardiac sensitization and possible failure. Causes chemical burns to the respiratory tract.
May cause drowsiness, unconsciousness, and central nervous system depression.
Chronic:
Chronic exposure to organic solvents has been associated with various neurotoxic effects including permanent brain and nervous system damage.

Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Remove contaminated clothing and shoes. Destroy contaminated shoes.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If breathing is difficult, give oxygen. Do NOT use mouth-to-mouth resuscitation. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Notes to Physician:

General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. Containers may explode in the heat of a fire. Flammable liquid and vapor. May be ignited by heat, sparks, and flame. Substance may react with water, and may release corrosive and/or toxic gases.
Extinguishing Media:
Do NOT use water directly on fire. For large fires, use water spray, fog or regular foam. For small fires, use dry chemical, carbon dioxide, water spray or regular foam. Cool containers with flooding quantities of water until well after fire is out.

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Remove all sources of ignition.
Provide ventilation. Do not get water inside containers. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.

Handling:
Wash thoroughly after handling. Use only in a well-ventilated area.
Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame. Do not ingest or inhale. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture. Storage at 2-8C is recommended.

Engineering Controls:
Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits.
Exposure Limits CAS# 108-88-3: United Kingdom, WEL - TWA: 50 ppm TWA; 191 mg/m3 TWA United Kingdom, WEL - STEL: 150 ppm STEL; 574 mg/m3 STEL United States OSHA: 200 ppm TWA; 300 ppm Ceiling Belgium - TWA: 50 ppm VLE; 191 mg/m3 VLE France - VME: 100 ppm VME; 375 mg/m3 VME France - VLE: 150 ppm VLE; 550 mg/m3 VLE Germany: 50 ppm TWA; 190 mg/m3 TWA Germany: Skin absorber Japan: 50 ppm OEL; 188 mg/m3 OEL Malaysia: 50 ppm TWA; 188 mg/m3 TWA Netherlands: 40 ppm MAC; 150 mg/m3 MAC Russia: 50 mg/m3 TWA Spain: 50 ppm VLA-ED; 191 mg/m3 VLA-ED CAS# 501-53-1: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHAs eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Physical State: Liquid
Color: clear slightly yellow
Odor: toluene-like odor
pH: Not available.
Vapor Pressure: 2 mmHg @ 78 C
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: Not available.
Autoignition Temperature: Not available.
Flash Point: 7 deg C ( 44.60 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: >100 deg C
Solubility in water: decomposes in water
Specific Gravity/Density: 1.0100g/cm3
Molecular Formula: Not applicable.
Molecular Weight:

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Ignition sources, moisture, excess heat.
Incompatibilities with Other Materials:
Acids (mineral, oxidizing, e.g. chromic acid, hypochlorous acid, nitric acid, sulfuric acid), oxidizing agents (strong, e.g. bromine, hydrogen peroxide, nitrogen dioxide, potassium nitrate), water reactive substances (e.g. acetic anyhdride, alkyl aluminum chloride, calcium carbide, ethyl dichlorosilane), iron salts.
Hazardous Decomposition Products:
Hydrogen chloride, phosgene, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Hazardous Polymerization: Has not been reported.

RTECS#:
CAS# 108-88-3: XS5250000 CAS# 501-53-1: LQ5860000 LD50/LC50:
CAS# 108-88-3: Draize test, rabbit, eye: 870 ug Mild; Draize test, rabbit, eye: 2 mg/24H Severe; Draize test, rabbit, skin: 435 mg Mild; Draize test, rabbit, skin: 500 mg Moderate; Draize test, rabbit, skin: 20 mg/24H Moderate; Inhalation, mouse: LC50 = 400 ppm/24H; Inhalation, mouse: LC50 = 30000 mg/m3/2H; Inhalation, mouse: LC50 = 19900 mg/m3/7H; Inhalation, mouse: LC50 = 10000 mg/m3; Inhalation, rat: LC50 = 49 gm/m3/4H; Oral, rat: LD50 = 636 mg/kg; Skin, rabbit: LD50 = 14100 uL/kg.
CAS# 501-53-1: Inhalation, rat: LC50 = 590 mg/m3/4H; Oral, rat: LD50 = 3 gm/kg.
Carcinogenicity:
Toluene - Not listed by ACGIH, IARC, or NTP.
Benzyl chloroformate - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Ecotoxicity:
Cas# 108-88-3: LC50(96Hr.) = 24.0 mg/L Rainbow trout LC50(96Hr) = 24.0 mg/L Bluegill EC50(48Hr) = 310-313 mg/L Photobacterium phosphoreum

Dispose of in a manner consistent with federal, state, and local regulations.

IATA
Shipping Name: CORROSIVE LIQUID, FLAMMABLE, N.O.S.*
Hazard Class: 8 (3)
UN Number: 2920
Packing Group: I
IMO
Shipping Name: CORROSIVE LIQUID, FLAMMABLE, N.O.S.
Hazard Class: 8 (3)
UN Number: 2920
Packing Group: I
RID/ADR
Shipping Name: CORROSIVE LIQUID, FLAMMABLE, N.O.S.
Hazard Class: 8
UN Number: 2920
Packing group: I
USA RQ: CAS# 108-88-3: 1000 lb final RQ; 454 kg final RQ

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: F C N
Risk Phrases:
R 11 Highly flammable.
R 20 Harmful by inhalation.
R 34 Causes burns.
R 50/53 Very toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
R 63 Possible risk of harm to the unborn child.
R 67 Vapours may cause drowsiness and dizziness.
Safety Phrases:
S 7 Keep container tightly closed.
S 16 Keep away from sources of ignition - No
smoking.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 36/37 Wear suitable protective clothing and
gloves.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 60 This material and its container must be
disposed of as hazardous waste.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 108-88-3: 2
CAS# 501-53-1: No information available.
Canada
CAS# 108-88-3 is listed on Canadas DSL List.
CAS# 501-53-1 is listed on Canadas DSL List.
CAS# 108-88-3 is listed on Canadas Ingredient Disclosure List.
CAS# 501-53-1 is listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 108-88-3 is listed on the TSCA inventory.
CAS# 501-53-1 is listed on the TSCA inventory.