Product Identification

Product Name

Methanesulfonic anhydride

Synonyms

Mesyl anhydride
methylsulfonyl methanesulfonate

CAS

7143-01-3

Formula

C2H6O5S2

Molecular Weight

174.2

EINECS

230-442-1

Beilstein/Gmelin

972316

Beilstein Reference

4-04-00-00028

EC Class

corrosive

Physical and Chemical Properties

Solubility in water

Very soluble

Melting Point

63 - 66

Boiling Point

289

Vapor Pressure

0.004 (25 C)

Partition Coefficient

-.93

Heat Of Vaporization

50.7 kJ/mol

Usage

May be used to generate mesylates.

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.

Eyes

Immediately flush with running water for at least 20 minutes.

Hazards Identification

Ingestion

See Inhalation.

Inhalation

TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.

Skin

Contact with molten substance may cause severe burns to skin and eyes. See Inhalation.

Eyes

See Inhalation.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

R 14 35

EC Safety Phrase

S 26 36/37/39 45

UN (DOT)

2586

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Fire Fighting Measures

Flash Point

129

Fire Fighting

Small Fires: Dry chemical, carbon dioxide or water spray. Large Fires: Dry chemical, carbon dioxide, alcohol-resistant foam or water spray.

Fire Potential

Combustible material: may burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks

ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.

Stability and Reactivity

Disposal Code

4

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2586

HS Code

2904 10 00