General Information
Version
6.7
Revision date
2026-04-23
Product name
Tetramethylammonium hydroxide pentahydrate
CAS No.
10424-65-4
Emergency telephone
+(353)-19014670
Icons in SDS
Company Information
company name
Merck Life Science Limited
e-mail address of the competent person responsible for the Safety Data Sheet
TechnicalService@merckgroup.com
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H300, H300+H310, H310, H314, H318, H370, H372, H411
Hazard statements
Code
Statements
H300
Fatal if swallowed
Section 2
SECTION 2: Hazards identification
Regulation (EC) No. 1272/2008 Classification of the substance or mixture
Signal word
Danger Danger
Hazard statements
H300 + H310 Fatal if swallowed or in contact with skin. H314 Causes severe skin burns and eye damage. H370 Causes damage to organs (Central nervous system). H372 Causes damage to organs (Liver, thymus) through prolonged or repeated exposure in contact with skin. H411 Toxic to aquatic life with long lasting effects. H370 Causes damage to organs. H372 Causes damage to organs through prolonged or repeated exposure in contact with skin. H314 Causes severe skin burns and eye damage. H300 + H310 Fatal if swallowed or in contact with skin.
Precautionary statements
P260 Do not breathe dust. P280 Wear protective gloves/ protective clothing/ eye protection/ face protection. P260 Do not breathe dust. P280 Wear protective gloves/ protective clothing/ eye protection/ face protection. P301 + P310 + P330 IF SWALLOWED: Immediately call a POISON CENTER/ doctor. Rinse mouth. P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water. P304 + P340 + P310 IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/ doctor. P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Response
P301 + P310 + P330 IF SWALLOWED: Immediately call a POISON CENTER/ doctor. Rinse mouth. P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water. P304 + P340 + P310 IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/ doctor. P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Reduced Labelling (<= 125 ml)
Supplemental label elements
none
2.3 Other hazards
This substance/mixture contains no components considered to be either persistent, bioaccumulative and toxic (PBT), or very persistent and very bioaccumulative (vPvB) at levels of 0.1% or higher.
ECOLOGICAL INFORMATION
The substance/mixture does not contain components considered to have endocrine disrupting properties according to REACH Article 57(f) or Commission Delegated regulation (EU) 2017/2100 or Commission Regulation (EU) 2018/605 at levels of 0.1% or higher.
TOXICOLOGICAL INFORMATION
The substance/mixture does not contain components considered to have endocrine disrupting properties according to REACH Article 57(f) or Commission Delegated regulation (EU) 2017/2100 or Commission Regulation (EU) 2018/605 at levels of 0.1% or higher.
2.1 Classification of the substance or mixture
Classification (REGULATION (EC) No 1272/2008) Acute toxicity, Category 2 H300: Fatal if swallowed. Acute toxicity, Category 1 H310: Fatal in contact with skin. Skin corrosion, Sub-category 1B H314: Causes severe skin burns and eye damage. Serious eye damage, Category 1 H318: Causes serious eye damage. Specific target organ toxicity - H370: Causes damage to organs. single exposure, Category 1, Central nervous system Specific target organ toxicity - H372: Causes damage to organs through repeated exposure, Category 1, prolonged or repeated exposure in contact Liver, thymus with skin. Long-term (chronic) aquatic hazard, H411: Toxic to aquatic life with long lasting Category 2 effects.