General Information
Version
5
Revision date
2026-07-26
Product name
3-(Methylthio)propionaldehyde
Product Synonyms
3-(Methylmercapto)propionaldehyde; Beta-(Methylmercapto)propionaldehyde; Methional; 3-(Methylmercapto)propionaldehyde; Beta-(Methylmercapto)propionaldehyde; Methional; 4-Thiapentanal
CAS No.
3268-49-3
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)
H227, H302, H311+H331, H315, H317, H318, H371, H400, H412
Hazard statements
Code
Statements
H227
Combustible liquid
Section 2
SECTION 2: Hazards identification
Physical State
Appearance/Odor
Liquid Colorless to pale yellow Stench Emergency Overview Toxic in contact with skin. Toxic if inhaled. Causes skin irritation. May cause an allergic skin reaction. Causes serious eye damage. May cause damage to organs. Very toxic to aquatic life. Combustible liquid. Harmful if swallowed. Harmful to aquatic life with long lasting effects. Stench Classification of the substance or mixture Flammable liquids Category 4 Acute Oral Toxicity Category 4 Acute Dermal Toxicity Category 3 Acute Inhalation Toxicity - Vapors Category 3 Skin Corrosion/Irritation Category 2 Serious Eye Damage/Eye Irritation Category 1 Skin Sensitization Category 1 Specific target organ toxicity - (single exposure) Category 2 Acute aquatic toxicity Category 1 Chronic aquatic toxicity Category 3 Label Elements
Signal word
Danger Hazard Statements H227 - Combustible liquid H315 - Causes skin irritation H317 - May cause an allergic skin reaction H318 - Causes serious eye damage H371 - May cause damage to organs H400 - Very toxic to aquatic life H302 - Harmful if swallowed H412 - Harmful to aquatic life with long lasting effects H311 + H331 - Toxic in contact with skin or if inhaled
Prevention
P210 - Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking P261 - Avoid breathing dust/fume/gas/mist/vapors/spray 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 P272 - Contaminated work clothing should not be allowed out of the workplace P280 - Wear protective gloves/protective clothing/eye protection/face protection
Response
P302 + P352 - IF ON SKIN: Wash with plenty of soap and water 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 P370 + P378 - In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish P361 + P364 - Take off immediately all contaminated clothing and wash it before reuse
Storage
P403 + P235 - Store in a well-ventilated place. Keep cool P405 - Store locked up
Disposal
P501 - Dispose of contents/ container to an approved waste disposal plant
Other physicochemical hazards
Combustible material.
Health hazards
Toxic in contact with skin. Toxic if inhaled. Harmful if inhaled. Causes skin irritation. May cause an allergic skin reaction. Causes serious eye damage. May cause damage to organs. Harmful if swallowed.
Environmental hazards
Very toxic to aquatic life. Harmful to aquatic life with long lasting effects. .
2.3 Other hazards
Stench. Toxic to terrestrial vertebrates. This product does not contain any known or suspected endocrine disruptors.
2.1 Classification of the substance or mixture
Classification of the substance or mixture Flammable liquids. Category 4 Acute Oral Toxicity Category 4 Acute Dermal Toxicity Category 3 Acute Inhalation Toxicity - Vapors Category 3 Skin Corrosion/Irritation Category 2 Serious Eye Damage/Eye Irritation Category 1 Skin Sensitization Category 1 Specific target organ toxicity - (single exposure) Category 2 Acute aquatic toxicity Category 1 Chronic aquatic toxicity