Note: Ingredients listed on restricted chemical lists
EC/CAS
101-68-8
Name of the chemical
4,4’-Methylenediphenyl diisocyanate
Concentration
30-60
General Information
Revision date
2026-03-13
Product name
Part A: Task 21
Product Synonyms
None
1.2.1 Relevant identified uses
Polyurethane Elastomer
Emergency telephone
1-800.255.3924, 1-813.248.0585
Icons in SDS
Company Information
company name
Smooth-On Inc
e-mail address of the competent person responsible for the Safety Data Sheet
sds@smooth-on.com
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H303+H313, H315, H317, H320, H332, H334, H335, H351, H373, H413
Hazard statements
Code
Statements
H303+H313
May be harmful if swallowed or in contact with skin
Section 2
SECTION 2: Hazards identification
Classification Acute toxicity - Inhalation (Dusts/Mists) Category 4 Skin corrosion/irritation Category 2 Serious eye damage/eye irritation Category 2B Respiratory sensitization Category 1 Skin sensitization Category 1 Carcinogenicity Category 2 Specific target organ toxicity (single exposure) Category 3 Specific target organ toxicity (repeated exposure) Category 2 Hazards not otherwise classified (HNOC) Not applicable Label elements Danger Hazard statements H315 - Causes skin irritation H317 - May cause an allergic skin reaction H320 - Causes eye irritation H332 - Harmful if inhaled H334 - May cause allergy or asthma symptoms or breathing difficulties if inhaled H335 - May cause respiratory irritation H351 - Suspected of causing cancer H373 - May cause damage to organs through prolonged or repeated exposure Precautionary Statements - Prevention Obtain special instructions before use Do not handle until all safety precautions have been read and understood Avoid breathing dust, fume, gas, mist, vapors and spray Use only outdoors or in a well-ventilated area Wash face, hands and any exposed skin thoroughly after handling In case of inadequate ventilation wear respiratory protection Contaminated work clothing must not be allowed out of the workplace Do not breathe dust, fume, gas, mist, vapors and spray Wear protective gloves Precautionary Statements - Response IF exposed or concerned: Get medical advice/attention Specific treatment (see supplemental first aid instructions on this label) IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing If eye irritation persists: Get medical advice/attention IF ON SKIN: Wash with plenty of water and soap Take off contaminated clothing and wash it before reuse If skin irritation or rash occurs: Get medical advice/attention IF INHALED: Remove person to fresh air and keep comfortable for breathing Call a POISON CENTER or doctor if you feel unwell If experiencing respiratory symptoms: Call a POISON CENTER or doctor Precautionary Statements - Storage Store locked up Store in a well-ventilated place. Keep container tightly closed
Precautionary statements
Disposal Dispose of contents and container in accordance with local, regional, national, and international regulations as applicable.
Further information
May be harmful if swallowed. May be harmful in contact with skin. May cause long lasting harmful effects to aquatic life.
2.1 Classification of the substance or mixture
Acute toxicity - Inhalation (Dusts/Mists) Category 4 Skin corrosion/irritation Category 2 Serious eye damage/eye irritation Category 2B Respiratory sensitization Category 1 Skin sensitization Category 1 Carcinogenicity Category 2 Specific target organ toxicity (single exposure) Category 3 Specific target organ toxicity (repeated exposure) Category 2 Hazards not otherwise classified (HNOC) Not applicable