Material Safety Data Sheet
Section 1. Identification of the substance
4-(Difluoromethoxy)benzenesulfonyl chloride
Product Name:
Synonyms:
Section 2. Hazards identification
Harmful by inhalation, in contact with skin, and if swallowed.
H314: Causes severe skin burns and eye damage
P280: Wear protective gloves/protective clothing/eye protection/face protection
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present
and easy to do – continue rinsing
P310: Immediately call a POISON CENTER or doctor/physician
Section 3. Composition/information on ingredients.
Ingredient name: 4-(Difluoromethoxy)benzenesulfonyl chloride
CAS number: 351003-34-4
Section 4. First aid measures
Skin contact: Immediately wash skin with copious amounts of water for at least 15 minutes while removing
contaminated clothing and shoes. If irritation persists, seek medical attention.
Eye contact: Immediately wash skin with copious amounts of water for at least 15 minutes. Assure adequate
flushing of the eyes by separating the eyelids with fingers. If irritation persists, seek medical
attention.
Inhalation: Remove to fresh air. In severe cases or if symptoms persist, seek medical attention.
Ingestion: Wash out mouth with copious amounts of water for at least 15 minutes. Seek medical attention.
Section 5. Fire fighting measures
In the event of a fire involving this material, alone or in combination with other materials, use dry
powder or carbon dioxide extinguishers. Protective clothing and self-contained breathing apparatus
should be worn.
Section 6. Accidental release measures
Personal precautions: Wear suitable personal protective equipment which performs satisfactorily and meets local/state/national
standards.
Respiratory precaution: Wear approved mask/respirator
Hand precaution: Wear suitable gloves/gauntlets
Skin protection: Wear suitable protective clothing
Eye protection: Wear suitable eye protection
Methods for cleaning up: Mix with sand or similar inert absorbent material, sweep up and keep in a tightly closed container
for disposal. See section 12.
Environmental precautions: Do not allow material to enter drains or water courses.
Section 7. Handling and storage
This product should be handled only by, or under the close supervision of, those properly qualified
Handling:
in the handling and use of potentially hazardous chemicals, who should take into account the fire,
health and chemical hazard data given on this sheet.
Storage: Store in closed vessels.
Section 8. Exposure Controls / Personal protection
Engineering Controls: Use only in a chemical fume hood.
Personal protective equipment: Wear laboratory clothing, chemical-resistant gloves and safety goggles.
General hydiene measures: Wash thoroughly after handling. Wash contaminated clothing before reuse.
Section 9. Physical and chemical properties
Appearance: Not specified
Boiling point: No data
Melting point: No data
Flash point: No data
Density: No data
Molecular formula: C7H5ClF2O3S
Molecular weight: 242.6
Section 10. Stability and reactivity
Conditions to avoid: Heat, flames and sparks.
Materials to avoid: Oxidizing agents.
Possible hazardous combustion products: Carbon monoxide, hydrogen chloride, hydrogen fluoride, sulfur oxides.
Section 11. Toxicological information
No data.
Section 12. Ecological information
No data.
Section 13. Disposal consideration
Arrange disposal as special waste, by licensed disposal company, in consultation with local waste
disposal authority, in accordance with national and regional regulations.
Section 14. Transportation information
UN Number: UN3265 Class: 8 Packing group: II
Proper shipping name: CORROSIVE LIQUID, ACIDIC, ORGANIC, N.O.S. (4-(Difluoromethoxy)benzenesulfonyl chlo-
ride)
Section 15. Regulatory information
No chemicals in this material are subject to the reporting requirements of SARA Title III, Section
302, or have known CAS numbers that exceed the threshold reporting levels established by SARA
Title III, Section 313.
SECTION 16 - ADDITIONAL INFORMATION
N/A
