Note: Ingredients listed on restricted chemical lists
EC/CAS
556-67-2
Name of the chemical
D4
Concentration
≤100
General Information
Version
1.0
Revision date
2025-07-07
Product name
Octamethylcyclotetrasiloxane
Substance name
Octamethylcyclotetrasiloxane
Product Synonyms
2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane; D4
Chemical name
octamethylcyclotetrasiloxane
CAS No.
556-67-2
supplier name
SynQuest Laboratories, Inc
Icons in SDS
Company Information
company name
SynQuest Laboratories, Inc
e-mail address of the competent person responsible for the Safety Data Sheet
info@synquestlabs.com
GHS Information
Signal word
Warning
Hazard Codes
Hazard statements (CLP)
H227, H302, H315, H319, H335, H361
Hazard statements
Code
Statements
H227
Combustible liquid
Section 2
SECTION 2: Hazards identification
Classification of the substance or mixture GHS US classification Flammable liquids, Category 4 H227 Combustible liquid. Acute toxicity (oral), Category 4 H302 Harmful if swallowed. Skin corrosion/irritation, Category 2 H315 Causes skin irritation. Serious eye damage/eye irritation, Category 2A H319 Causes serious eye irritation. Reproductive toxicity, Category 2 H361 Suspected of damaging fertility or the unborn child. Specific target organ toxicity – Single exposure, Category 3, H335 May cause respiratory irritation. Respiratory tract irritation Full text of H statements : see section 16
2.2 Label elements
GHS US labeling
Signal word
Warning
Hazard statements
H227 - Combustible liquid H302 - Harmful if swallowed H315 - Causes skin irritation H319 - Causes serious eye irritation H335 - May cause respiratory irritation H361 - Suspected of damaging fertility or the unborn child
Precautionary statements
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. P261 - Avoid breathing fumes, mist, spray, vapors. P264 - Wash hands, forearms and face 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. P301+P312 - If swallowed: Call a POISON CENTER or doctor/ physician if you feel unwell 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 P308+P313 - If exposed or concerned: Get medical advice/attention. P312 - Call a POISON CENTER or doctor/physician if you feel unwell P321 - Specific treatment (see supplemental first aid instruction on this label). P330 - Rinse mouth. P332+P313 - If skin irritation occurs: Get medical advice or attention. P337+P313 - If eye irritation persists: Get medical advice or attention. P362+P364 - Take off contaminated clothing and wash it before reuse. P370+P378 - In case of fire: Use appropriate media to extinguish. P403 - Store in a well-ventilated place. P403+P233 - Store in a well-ventilated place. Keep container tightly closed. P405 - Store locked up. P501 - Dispose of contents and/or container to hazardous or special waste collection point, in accordance with local, regional, national and/or international regulations. 2.3. Hazards associated with known or reasonably anticipated uses No additional information available
2.3 Other hazards
No additional information available 2.5. Unknown acute toxicity No additional information available
2.1 Classification of the substance or mixture
GHS US classification Flammable liquids, Category 4 H227 Combustible liquid. Acute toxicity (oral), Category 4 H302 Harmful if swallowed. Skin corrosion/irritation, Category 2 H315 Causes skin irritation. Serious eye damage/eye irritation, Category 2A H319 Causes serious eye irritation. Reproductive toxicity, Category 2 H361 Suspected of damaging fertility or the unborn child. Specific target organ toxicity – Single exposure, Category 3, H335 May cause respiratory irritation. Respiratory tract irritation Full text of H statements : see section 16