Cyclotetrasiloxane
✓ EU AllowedIdentification
CAS Number 556-67-2
EINECS / EC 209-136-7
CosIng Ref 33104
Chemical Name Octamethylcyclotetrasiloxane,
Formula C8H24O4Si4
Mol. Weight 296.61 g/mol
Function & Classification
Primary Function Hair Conditioning
Secondary Functions HAIR CONDITIONING; SOLVENT
Origin Synthetic
Category Other
EU Regulatory Status
SCCS Opinion View SCCS opinion →
Safety Profile
1 / 10
Skin Type Compatibility
Fungal Acne Safe ✓ Safe
Toxicology Profile
NOAEL 400 mg/kg bw/day (oral, rat) SCCS/1241/10
Sensitization Non-sensitizer
Genotoxicity Non-genotoxic
Phototoxicity Non-phototoxic
LD₅₀ Oral >5000 mg/kg (rat)
Skin Irritation (Draize) 0.0 / 4.0
Eye Irritation (Draize) 0.2 / 4.0
Source SCCS Opinion ↗
Formulation Guidelines
Usage level, pH range, solubility and addition phase not yet available.
Usage Level % · Addition Phase · Solubility
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