Octamethylcyclotetrasiloxane
Product identifier
- Product name: Octamethylcyclotetrasiloxane
- CBnumber: CB4490223
- CAS: 556-67-2
- EINECS Number: 209-136-7
- Synonyms: D4,octamethylcyclotetrasiloxane
Relevant identified uses of the substance or mixture and uses advised against
- Relevant identified uses: For R&D use only. Not for medicinal, household or other use.
- Uses advised against: none
Company Identification
- Company: Chemicalbook
- Address: Building 1, Huihuang International, Shangdi 10th Street, Haidian District, Beijing
- Telephone: 400-158-6606
GHS Label elements, including precautionary statements
-
Symbol(GHS)
- Signal wordWarning
Substance
- Product name: Octamethylcyclotetrasiloxane
- Synonyms: D4,octamethylcyclotetrasiloxane
- CAS: 556-67-2
- EC number: 209-136-7
- MF: C8H24O4Si4
- MW: 296.62
Description of first aid measures
General adviceMost important symptoms and effects, both acute and delayed
Indication of any immediate medical attention and special treatment needed
Extinguishing media
Suitable extinguishing mediaSpecial hazards arising from the substance or mixture
Carbon oxides silicon oxides Combustible.
Vapors are heavier than air and may spread along floors. Forms explosive mixtures with air at elevated temperatures.
Development of hazardous combustion gases or vapours possible in the event of fire.
Advice for firefighters
Stay in danger area only with self-contained breathing apparatus. Prevent skin contact by keeping a safe distance or by wearing suitable protective clothing.
Further information
Remove container from danger zone and cool with water. Suppress (knock down) gases/vapors/mists with a water spray jet. Prevent fire extinguishing water from contaminating surface water or the ground water system.
NFPA 704
| HEALTH | 2 | Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury (e.g. diethyl ether, ammonium phosphate, iodine) | |
| FIRE | 2 | Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur and multiple finely divided suspended solids that do not require heating before ignition can occur. Flash point between 37.8 and 93.3 °C (100 and 200 °F). (e.g. diesel fuel, sulfur) | |
| REACT | 0 | Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2) | |
| SPEC. HAZ. |
Personal precautions, protective equipment and emergency procedures
Advice for non-emergency personnel: Do not breathe vapors, aerosols. Avoid substance contact. Ensure adequate ventilation. Keep away from heat and sources of ignition.
Evacuate the danger area, observe emergency procedures, consult an expert. For personal protection see section 8.
Environmental precautions
Do not let product enter drains. Risk of explosion.
Methods and materials for containment and cleaning up
Cover drains. Collect, bind, and pump off spills. Observe possible material restrictions (see sections 7 and 10). Take up with liquid-absorbent material (e.g. Chemizorb? ). Dispose of properly. Clean up affected area.
Reference to other sections
For disposal see section 13.
Precautions for safe handling
Advice on protection against fire and explosion
Keep away from open flames, hot surfaces and sources of ignition.Take precautionary measures against static discharge.
Hygiene measures
Change contaminated clothing. Preventive skin protection recommended. Wash hands after working with substance.
For precautions see section 2.2.
Conditions for safe storage, including any incompatibilities
Storage conditions
Keep container tightly closed in a dry and well-ventilated place. Keep away from heat and
sources of ignition.
Specific end use(s)
Apart from the uses mentioned in section 1.2 no other specific uses are stipulated
control parameter
Hazard composition and occupational exposure limitsExposure controls
Personal protective equipmentUse equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU). Safety glasses
This recommendation applies only to the product stated in the safety data sheet, supplied by us and for the designated use. When dissolving in or mixing with other substances and under conditions deviating from those stated in EN374 please contact the supplier of CE-approved gloves (e.g. KCL GmbH, D-36124 Eichenzell, Internet: www.kcl.de).
Full contact
Material: Nitrile rubber
Minimum layer thickness: 0,4 mm Break through time: 480 min
Material tested:Camatril? (KCL 730 / Aldrich Z677442, Size M)
This recommendation applies only to the product stated in the safety data sheet, supplied by us and for the designated use. When dissolving in or mixing with other substances and under conditions deviating from those stated in EN374 please contact the supplier of CE-approved gloves (e.g. KCL GmbH, D-36124 Eichenzell, Internet: www.kcl.de).
Splash contact Material: Nitrile rubber
Minimum layer thickness: 0,11 mm Break through time: 30 min
Material tested:KCL 741 Dermatril? L
Flame retardant antistatic protective clothing.
Recommended Filter type: Filter A (acc. to DIN 3181) for vapours of organic compounds
The entrepeneur has to ensure that maintenance, cleaning and testing of respiratory protective devices are carried out according to the instructions of the producer.
These measures have to be properly documented.
Do not let product enter drains. Risk of explosion.
Information on basic physicochemical properties
- Appearancecolorless liquid
- Odourweak
- Odour ThresholdNo data available
- pHNo data available
- Melting point/freezing pointMelting point/range: 17 - 18 °C - lit.
- Initial boiling point and boiling range175 - 176 °C - lit.
- Flash point51 °C - closed cup - DIN 51755 Part 1
- Evaporation rateNo data available
- Flammability (solid, gas)No data available
- Upper/lower flammability or explosive limits Upper explosion limit: 11,7 %(V) 19,5 %(V) at 1010 hPa Lower explosion limit: 0,4 %(V)0,61 %(V) at 1010 hPa
- Vapour pressure 1,3 hPa at 20 °C
- Vapour density 1 (vs air)
- Relative density0.956
- Water solubility0,001 g/l at 25 °C - Hydrolysis
- Partition coefficient: n-octanol/waterlog Pow: 6,488 at 25,1 °C - Potential bioaccumulation
- Autoignition temperature384 - 387 °C at 1.013 hPa - ASTM E-659
- Decomposition temperature313 °C -
- ViscosityViscosity, kinematic: 1,6 mm2/s at 20 °C - (calculated), (ECHA) Viscosity, dynamic: No data available
- Explosive propertiesNo data available
- Oxidizing propertiesNo data available
Other safety information
No data available
Reactivity
Vapor/air-mixtures are explosive at intense warming.
Chemical stability
The product is chemically stable under standard ambient conditions (room temperature) .
Possibility of hazardous reactions
Violent reactions possible with: Strong oxidizing agents alkalines
acids
Conditions to avoid
Heating.
Incompatible materials
No data available
Hazardous decomposition products
In the event of fire: see section 5
Information on toxicological effects
Acute toxicity(OECD Test Guideline 401)
LC50 Inhalation - Rat - male and female - 4 h - 36 mg/l (OECD Test Guideline 403)
LD50 Dermal - Rat - male and female - > 2.400 mg/kg (OECD Test Guideline 402)
Remarks: (IUCLID)
Result: No skin irritation - 24 h (OECD Test Guideline 404)
Result: No eye irritation (OECD Test Guideline 405)
Result: Does not cause skin sensitization. (OECD Test Guideline 406)
Metabolic activation: with and without metabolic activation Method: OECD Test Guideline 473
Result: negative
Test Type: Ames test
Test system: S. typhimurium
Metabolic activation: with and without metabolic activation Method: OECD Test Guideline 471
Result: negative
Test Type: In vitro mammalian cell gene mutation test Test system: Mouse lymphoma test
Metabolic activation: with and without metabolic activation Method: OECD Test Guideline 476
Result: negative
Test Type: Micronucleus test Species: Rat
Application Route: Inhalation Method: OECD Test Guideline 475 Result: negative
Test Type: dominant lethal test Species: Rat
Cell type: Bone marrow Application Route: Oral
Method: OECD Test Guideline 478 Result: negative
Toxicity
(US-EPA)
flow-through test EC50 - Daphnia magna (Water flea) - > 0,015 mg/l
- 48 h (US-EPA)
Persistence and degradability
Biodegradability aerobic - Exposure time 29 d
Result: 3,7 % - Not readily biodegradable. (OECD Test Guideline 310)
Bioaccumulative potential
Bioaccumulation Pimephales promelas (fathead minnow) - 0,160
μg/l(Octamethylcyclotetrasiloxane)
Bioconcentration factor (BCF): 12.400 (US-EPA)
Mobility in soil
No data available
Results of PBT and vPvB assessment
This substance/mixture contains components considered to be either persistent, bioaccumulative and toxic (PBT), or very persistent and very bioaccumulative (vPvB).
Other adverse effects
Discharge into the environment must be avoided.
Waste treatment methods
Product
See www.retrologistik.com for processes regarding the return of chemicals and containers, or contact us there if you have further questions.
UN number
ADR/RID: 1993 IMDG: 1993 IATA: 1993
UN proper shipping name
ADR/RID: FLAMMABLE LIQUID, N.O.S. (Octamethylcyclotetrasiloxane) IMDG: FLAMMABLE LIQUID, N.O.S. (Octamethylcyclotetrasiloxane) IATA: Flammable liquid, n.o.s. (Octamethylcyclotetrasiloxane)
Transport hazard class(es)
ADR/RID: 3 IMDG: 3 IATA: 3
Packaging group
ADR/RID: III IMDG: III IATA: III
Environmental hazards
ADR/RID: no IMDG Marine pollutant: no IATA: no
Special precautions for user
No data available
Safety, health and environmental regulations/legislation specific for the substance or mixture
Regulations on the Safety Management of Hazardous ChemicalsAbbreviations and acronyms
- ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
- CAS: Chemical Abstracts Service
- EC50: Effective Concentration 50%
- IATA: International Air Transportation Association
- IMDG: International Maritime Dangerous Goods
- LC50: Lethal Concentration 50%
- LD50: Lethal Dose 50%
- RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
- STEL: Short term exposure limit
- TWA: Time Weighted Average
References
【1】CAMEO Chemicals, website: http://cameochemicals.noaa.gov/search/simple
【2】ChemIDplus, website: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
【3】ECHA - European Chemicals Agency, website: https://echa.europa.eu/
【4】eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website: http://www.echemportal.org/echemportal/index?pageID=0&request_locale=en
【5】ERG - Emergency Response Guidebook by U.S. Department of Transportation, website: http://www.phmsa.dot.gov/hazmat/library/erg
【6】Germany GESTIS-database on hazard substance, website: http://www.dguv.de/ifa/gestis/gestis-stoffdatenbank/index-2.jsp
【7】HSDB - Hazardous Substances Data Bank, website: https://toxnet.nlm.nih.gov/newtoxnet/hsdb.htm
【8】IARC - International Agency for Research on Cancer, website: http://www.iarc.fr/
【9】IPCS - The International Chemical Safety Cards (ICSC), website: http://www.ilo.org/dyn/icsc/showcard.home
【10】Sigma-Aldrich, website: https://www.sigmaaldrich.com/
The information in this MSDS is only applicable to the specified product, unless otherwise specified, it is not applicable to the mixture of this product and other substances. This MSDS only provides information on the safety of the product for those who have received the appropriate professional training for the user of the product. Users of this MSDS must make independent judgments on the applicability of this SDS. The authors of this MSDS will not be held responsible for any harm caused by the use of this MSDS.