General Information
Version
6.9
Revision date
2025-11-06
Product name
Potassium methoxide
CAS No.
865-33-8
1.2.1 Relevant identified uses
Laboratory chemicals, Synthesis of substances
1.2.2. Uses advised against
The product is being supplied under the TSCA R&D Exemption
Emergency telephone
800-424-9300, +1-703- 527-3887
Icons in SDS
Company Information
company name
Sigma-Aldrich Inc
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H251, H314
Hazard statements
Code
Statements
H251
Self-heating; may catch fire
Section 2
SECTION 2: Hazards identification
2.3 Other hazards
Reacts violently with water.
Signal word
Danger
Hazard statements
H251 Self-heating: may catch fire. H314 Causes severe skin burns and eye damage.
Prevention
P235 + P410 Keep cool. Protect from sunlight. P260 Do not breathe dust. P264 Wash skin thoroughly after handling. P280 Wear protective gloves/ protective clothing/ eye protection/ face protection.
Response
P301 + P330 + P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/ shower. P304 + P340 + P310 IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/ doctor. P305 + P351 + P338 + P310 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/ doctor. P363 Wash contaminated clothing before reuse.
Storage
P403 + P235 Store in a well-ventilated place. Keep cool. P405 Store locked up. P407 Maintain air gap between stacks/ pallets. P420 Store away from other materials.
Disposal
P501 Dispose of contents/ container to an approved waste disposal plant.
2.1 Classification of the substance or mixture
(29 CFR 1910.1200) Hazards for the product as supplied Self-heating chemicals : Category 1 Skin corrosion : Category 1B Serious eye damage : Category 1 Other hazards Reacts violently with water.
