Ingredient
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Cyclomethicone

✓ EU Allowed

Identification

CAS Number 556-67-2
EINECS / EC 209-136-7
CosIng Ref 33101
Formula C8H24O4Si4
Mol. Weight 296.61 g/mol

Function & Classification

Primary Function Emollient
Secondary Functions Solvent, Skin Conditioning
Origin Synthetic
Category Silicones
Manufacturer BRB International B.V.

EU Regulatory Status

🇪🇺
✓ Allowed — EU Reg. 1223/2009 Entry 1388 of Annex II corresponds to D4 (Cyclotetrasiloxane). If Cyclomethicone contains D4 then entry II/1388 applies. Restricted under COMMISSION REGULATION (EU) 2024/1328. 1. Shall not be placed on the market (a) as a substance on its own; (b) as a constituent of other substances; or (c) in mixtures; in a concentration equal to or greater than 0,1 % by weight of the respective substance after 6 June 2026. [...] 3. By way of derogation: (a) for D4 and D5 in wash-off cosmetic products, paragraph 1, point (c), shall apply after 31 January 2020. For the purposes of this point, “wash-off cosmetic products” means cosmetic products as defined in Article 2(1), point (a), of Regulation (EC) No 1223/2009 of the European Parliament and of the Council (*1) that, under normal conditions of use, are washed off with water after application; (b) for all cosmetic products other than the ones mentioned in paragraph 3(a), paragraph 1 shall apply after 6 June 2027.
SCCS Opinion View SCCS opinion →

Safety Profile

1 / 10
✅
Comedogenic Rating: 1/5
Low risk — should be fine for most skin types
Skin Type Compatibility
💧 Acne-Prone ✓ Safe
🍄 Fungal Acne Safe ✓ Safe
Toxicology Profile
NOAEL 300 mg/kg bw/day (inhalation) SCCS/1549/15
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) 0.0 / 4.0
Source SCCS Opinion ↗

Formulation Guidelines

Benefits Volatile carrier; dry feel

Suppliers & Documents

BRB International B.V. 🇳🇱 Netherlands
BRB CM 50 Manufacturer
Azelis 🇧🇪 Belgium
Turkey distributor
Documents

External Resources

INCIDecoder → EU CosIng →