General Information
Version
VersionCode 00
Revision date
2025-12-21
Product name
Methyl methanesulfonate (Standard)
CAS No.
66-27-3
Emergency telephone
609-228-6898
Icons in SDS
Company Information
company name
MedChemExpress USA
e-mail address of the competent person responsible for the Safety Data Sheet
sales@medchemexpress.com
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H301, H315, H319, H334, H340, H351, H361, H373, H411
Hazard statements
Code
Statements
H301
Toxic if swallowed
Section 2
SECTION 2: Hazards identification
Classification of the substance or mixture
Hazard pictograms
Signal word Danger
Hazard statements
H301 Toxic if swallowed H315 Causes skin irritation H319 Causes serious eye irritation H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled H340 May cause genetic defects H351 Suspected of causing cancer H361 Suspected of damaging fertility or the unborn child H373 May cause damage to organs through prolonged or repeated exposure H411 Toxic to aquatic life with long lasting effects
Prevention
P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling P270 Do not eat, drink or smoke when using this product. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 Wear respiratory protection.
Response
P302+P352 IF ON SKIN: Wash with plenty of soap and water. P304+P340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. P330 Rinse mouth. P362+P364 Take off contaminated clothing and wash it before reuse. P391 Collect spillage.
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents/container to in accordance with local regulation.
2.3 Other hazards
None.
2.1 Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS) Acute toxicity, oral (Category 3),H301 Skin corrosion/irritation (Category 2),H315 Serious eye damage/eye irritation (Category 2A),H319 Sensitisation, respiratory (Category 1, 1A, 1B),H334 Germ cell mutagenicity (Category 1B),H340 Carcinogenicity (Category 2),H351 Reproductive toxicity (Category 2),H361 Specific target organ toxicity, repeated exposure (Category 2),H373 Hazardous to the aquatic environment, long-term hazard (Category 2),H411
