Definition
US FDA substance register · UNII SJ4D71ZQF4 · registered name 1,1,3,3-TETRAMETHYL-1,3-DIVINYLDISILOXANE · single chemical substance
Divinyldisiloxane is the organic compound that conforms to the formula:
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 2627-95-4
- EC No.EU chemical inventory number
- 220-099-6
- DTXSIDUS EPA chemical ID
- DTXSID7038810
- DTXCIDUS EPA compound ID
- DTXCID5018810
- IUPAC
- 1,3-Diethenyl-1,1,3,3-tetramethyldisiloxane
- Molecular formula
- C8H18OSi2
- Molecular weight
- 186.401 g/mol
Measured properties
- Appearance
- liquid
- Melting/freezing point
- -99 ℃
- Initial boiling point and range
- 130 ℃(Atm. pressure 1013 hPa)
- Flash point
- 21.7 ℃(at 101.3 kPa, closed cup)
- Evaporation rate
- (&, lt, 1)
- Upper/lower flammability or explosive limits
- - / 0.81 %
- Vapour pressure
- 6 ㎜Hg (at 20℃)
- Vapour density
- (&, gt, 1)
- Relative density
- 0.809-0.82 ()
- n-Octanol/water partition coefficient (Kow)
- 4.15
- Molecular weight
- 186.40
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: KOSHA safety data sheets (Korea)
What products actually use it for
What the 7 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Intermediate3
- Monomers2
- Terminator/blocker1
- Chelating agent1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
2 skin studies and 2 eye studies are on record.
The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 4 studies
- Category 6.3A (Category 2)
Skin Irritation · Read Across - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · other guideline: U.S. Food and Drug Administration regulations, 40 CFR, Part 792 according to - Category 6.4A (Category 2A)
Eye Irritation · Read Across - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: CFR 191.12 Ch Title 21 according to
Source: US EPA CompTox dashboard
Linked databases 13
- Australian Industrial Chemicals Inventory (AICIS)
- ChEMBL
- EU CosIng ingredient list 2
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- NIST Chemistry WebBook
- UniChem cross-reference IDs
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · English · Chinese