Note: Ingredients listed on restricted chemical lists
EC/CAS
60-56-0
Name of the chemical
Thiamazole (INN)
Concentration
N/A
General Information
Version
6.11
Revision date
2025-06-25
Product name
Methimazole
CAS No.
60-56-0
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)
H302, H317, H319, H360, H373
Hazard statements
Code
Statements
H302
Harmful if swallowed
Section 2
SECTION 2: Hazards identification
Other hazards
Caution Physiologically highly active, therapeutically usable substance. The substance must be handled with the care required for hazardous materials
Signal word
Danger
Hazard statements
H302 Harmful if swallowed. H317 May cause an allergic skin reaction. H319 Causes serious eye irritation. H360 May damage fertility or the unborn child. H373 May cause damage to organs (Endocrine system) through prolonged or repeated exposure.
Prevention
P201 Obtain special instructions before use. P202 Do not handle until all safety precautions have been read and understood. P260 Do not breathe dust. P264 Wash skin thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P272 Contaminated work clothing must not be allowed out of the workplace. P280 Wear protective gloves, protective clothing, eye protection and face protection.
Response
P301 + P312 + P330 IF SWALLOWED: Call a POISON CENTER/ doctor if you feel unwell. Rinse mouth. P302 + P352 IF ON SKIN: Wash with plenty of water. P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P308 + P313 IF exposed or concerned: Get medical advice/ attention. P333 + P313 If skin irritation or rash occurs: Get medical advice/ attention. P337 + P313 If eye irritation persists: Get medical
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents/ container to an approved waste disposal plant.
2.1 Classification of the substance or mixture
(29 CFR 1910.1200) Acute toxicity (Oral) : Category 4 Eye irritation : Category 2A Skin sensitisation : Category 1 Reproductive toxicity : Category 1A Specific target organ : Category 2 (Endocrine system) toxicity - repeated exposure Other hazards Caution: Physiologically highly active, therapeutically usable substance. The substance must be handled with the care required for hazardous materials.
