General Information
Version
6
Revision date
2026-07-25
Product name
Methylcyclopentadiene, dimer
Product Synonyms
4,7-Methano-1H-indene, 3a,4,7,7a-tetrahydrodimethyl-; Bis(methylcyclopentadiene); 3a,4,
CAS No.
26472-00-4
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)
H226, H304, H313, H315, H319, H332, H340, H350, H410
Hazard statements
Code
Statements
H226
Flammable liquid and vapour
Section 2
SECTION 2: Hazards identification
Physical State
Appearance/Odor
Liquid Light yellow Odorless Emergency Overview Flammable liquid and vapor. May be fatal if swallowed and enters airways. Causes serious eye irritation. May be harmful in contact with skin. Causes skin irritation. Harmful if inhaled. Very toxic to aquatic life with long lasting effects. May cause genetic defects. May cause cancer. Classification of the substance or mixture Flammable liquids Category 3 Aspiration Toxicity Category 1 Acute Dermal Toxicity Category 5 Acute Inhalation Toxicity - Vapors Category 4 Skin Corrosion/Irritation Category 2 Serious Eye Damage/Eye Irritation Category 2 Germ Cell Mutagenicity Category 1B Carcinogenicity Category 1A Acute aquatic toxicity Category 1 Chronic aquatic toxicity Category 1 Label Elements
Signal word
Danger Hazard Statements H226 - Flammable liquid and vapor H304 - May be fatal if swallowed and enters airways H313 - May be harmful in contact with skin H315 - Causes skin irritation H319 - Causes serious eye irritation H340 - May cause genetic defects H332 - Harmful if inhaled H350 - May cause cancer H410 - Very toxic to aquatic life with long lasting effects
Prevention
P201 - Obtain special instructions before use P202 - Do not handle until all safety precautions have been read and understood P210 - Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking P240 - Ground and bond container and receiving equipment P241 - Use explosion-proof electrical/ ventilating/ lighting equipment P261 - Avoid breathing dust/fume/gas/mist/vapors/spray P233 - Keep container tightly closed P242 - Use non-sparking tools P243 - Take action to prevent static discharges P280 - Wear eye protection/ face protection P280 - Wear protective gloves P264 - Wash face, hands and any exposed skin thoroughly after handling P271 - Use only outdoors or in a well-ventilated area
Response
P303 + P361 + P353 - IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower P305 + P351 + P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P301 + P310 - IF SWALLOWED: Immediately call a POISON CENTER or doctor P304 + P340 - IF INHALED: Remove person to fresh air and keep comfortable for breathing P308 + P313 - IF exposed or concerned: Get medical advice/attention P331 - Do NOT induce vomiting P332 + P313 - If skin irritation occurs: Get medical advice/attention P370 + P378 - In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish P362 + P364 - Take off contaminated clothing and wash it before reuse
Storage
P403 + P235 - Store in a well-ventilated place. Keep cool
Disposal
P501 - Dispose of contents/ container to an approved waste disposal plant
Other physicochemical hazards
Vapors may cause flash fire or explosion. Flammable liquid.
Health hazards
May be harmful in contact with skin. Causes skin irritation. Aspiration hazard if swallowed - can enter lungs and cause damage. May cause genetic defects. Causes serious eye irritation. Harmful if inhaled. May cause cancer.
Environmental hazards
Very toxic to aquatic life with long lasting effects. Is not likely mobile in the environment due its low water solubility. Spillage unlikely to penetrate soil. The product is insoluble and floats on water. The product evaporates slowly. No information available This product does not contain any known or suspected endocrine disruptors.
2.1 Classification of the substance or mixture
Flammable liquids. Category 3 Aspiration Toxicity Category 1 Acute Dermal Toxicity Category 5 Acute Inhalation Toxicity - Vapors Category 4 Skin Corrosion/Irritation Category 2 Serious Eye Damage/Eye Irritation Category 2 Germ Cell Mutagenicity Category 1B Carcinogenicity Category 1A Acute aquatic toxicity Category 1 Chronic aquatic toxicity