Note: Ingredients listed on restricted chemical lists
EC/CAS
7732-18-5
Name of the chemical
Water, distilled, conductivity or of similar purity H2O
Concentration
N/A
General Information
Version
12
Revision date
2026-08-03
Product name
Tetramethylammonium hydroxide, 25% w/w aqueous solution
Product Synonyms
N,N,N-Trimethylmethanaminium hydroxide
supplier name
Avocado Research Chemicals Ltd
Emergency telephone
001-201-796-7100, +32 14 57 52 99, 001-800-424-9300, 001-703-527-3887
Icons in SDS
Company Information
company name
Avocado Research Chemicals Ltd
e-mail address of the competent person responsible for the Safety Data Sheet
begel.sdsdesk@thermofisher.com
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H300+H310, H314, H370, H372, H411
Hazard statements
Code
Statements
H300+H310
Fatal if swallowed or in contact with skin
Section 2
SECTION 2: Hazards identification
Physical State
Appearance/Odor
Liquid Yellow Ammonia-like Emergency Overview Fatal if swallowed. Fatal in contact with skin. Causes severe skin burns and eye damage. Causes damage to organs. Causes damage to organs through prolonged or repeated exposure. Toxic to aquatic life with long lasting effects. Air sensitive. Classification of the substance or mixture Acute Oral Toxicity Category 2 Acute Dermal Toxicity Category 1 Skin Corrosion/Irritation B Category 1 Serious Eye Damage/Eye Irritation Category 1 Specific target organ toxicity - (single exposure) Category 1 Specific target organ toxicity - (repeated exposure) Category 1 Acute aquatic toxicity Category 2 Chronic aquatic toxicity Category 2 Label Elements
Signal word
Danger Hazard Statements H314 - Causes severe skin burns and eye damage H370 - Causes damage to organs H372 - Causes damage to organs through prolonged or repeated exposure H411 - Toxic to aquatic life with long lasting effects H300 + H310 - Fatal if swallowed or in contact with skin
Prevention
P262 - Do not get in eyes, on skin, or on clothing P264 - Wash face, hands and any exposed skin thoroughly after handling P270 - Do not eat, drink or smoke when using this product P271 - Use only outdoors or in a well-ventilated area P280 - Wear protective gloves/protective clothing/eye protection/face protection
Response
P303 + P361 + P353 - IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower P304 + P340 - IF INHALED: Remove person to fresh air and keep comfortable for breathing 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 P330 - Rinse mouth P331 - Do NOT induce vomiting P363 - Wash contaminated clothing before reuse
Storage
P403 + P233 - Store in a well-ventilated place. Keep container tightly closed P405 - Store locked up
Disposal
P501 - Dispose of contents/ container to an approved waste disposal plant
Other physicochemical hazards
None identified.
Health hazards
Very toxic if swallowed. Fatal in contact with skin. Corrosive. Causes skin and eye burns. Causes serious eye damage. Causes damage to organs. Causes damage to organs through prolonged or repeated exposure.
Environmental hazards
Toxic to aquatic life with long lasting effects. . Will likely be mobile in the environment due to its water solubility. The product is water soluble, and may spread in water systems. This product does not contain any known or suspected endocrine disruptors.
2.1 Classification of the substance or mixture
Acute Oral Toxicity Category 2 Acute Dermal Toxicity Category 1 Skin Corrosion/Irritation B Category 1 Serious Eye Damage/Eye Irritation Category 1 Specific target organ toxicity - (single exposure) Category 1 Specific target organ toxicity - (repeated exposure) Category 1 Acute aquatic toxicity Category 2 Chronic aquatic toxicity
