Is Silk Amino Acids safe in cosmetics?
Silk Amino Acids has a safety rating of "EXCELLENT" in our database. EU status: permitted. US status: permitted.
Excellent
Cosmetic Ingredient
Silk Amino Acids
INCI: SILK AMINO ACIDS
Silk Amino Acids (CAS 96690-41-4) is a cosmetic cosmetic ingredient functioning as Skin Conditioning, Hair Conditioning, Humectant. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 96690-41-4 →
Auto-generated CPSR Part A draft with source citations
Function
Skin Conditioning, Hair Conditioning, Humectant
Safety Rating
EXCELLENT
Chemistry & Identifiers
EC Number
306-235-8
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
CIR Expert Panel concluded safe in present practices of use and concentration in cosmetics
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Silk Amino Acids.
Calculate MoS for your specific formulation with the MoS Calculator.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
10 - 100 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Additional Ingredient Properties
10 property records from structured ingredient metadata.
acne
{"cas_number": "96690-41-4", "anti_acne_mechanism": "anti_inflammatory", "comedogenicity_rating_0_to_5": "0", "acne_type_efficacy": "inflammatory", "sebum_reduction_pct_clinical": "0-5", "prescription_required_usa": "No", "otc_drug_monograph_category": "No", "max_otc_concentration_pct": "No limit", "japan_quasi_drug_anti_acne": "No", "korea_functional_cosmetic_acne": "No", "eu_cosmetic_restriction…
amino_acid
{"cas_number": "90147-06-3", "ingredient_class": "silk_derivative", "source_origin": "animal", "molecular_weight_range_Da": "100-300", "amino_acid_composition_key": "glycine_alanine_serine_rich", "isoelectric_point": "4.5", "charge_at_pH_5_5": "anionic", "water_solubility": "soluble", "oil_solubility": "insoluble", "film_forming_ability": "moderate", "moisture_binding_capacity": "excellent", "NMF_…
hair_care
{"hair_function": "protein-treatment", "hair_type_suitability": "fine/medium", "curl_pattern_suitability": "all", "porosity_suitability": "medium/high", "protein_sensitivity": "protein", "moisture_protein_balance": "yes", "cg_method_approved": "not-a-silicone", "silicone_type": "not-a-sulfate", "sulfate_type": "no", "drying_alcohol": "no", "fatty_alcohol": "no", "heat_protectant": "yes", "color_sa…
hair_conditioning
{"cas_number": "977055-62-5", "ingredient_class": "amino_acid_hair", "chemical_type": "amino_acid", "substantivity_to_hair": "excellent", "deposition_from_shampoo": "yes", "deposition_from_conditioner": "yes", "conditioning_mechanism": "penetrating_film_forming", "hair_penetration": "cuticle_cortex", "molecular_weight_effect_on_penetration": "small_amino_acids", "wet_combing_force_reduction_pct": …
humectant
{"cas_number": "96690-41-4", "ingredient_class": "humectant/protein_derivative", "molecular_weight_Da": "200-1000", "chemical_type": "protein_derivative", "water_binding_mechanism": "hydrogen_bonding/hygroscopic/film_forming", "water_holding_capacity_g_per_g": "0.4-0.7", "hygroscopicity_at_50_RH": "good", "hygroscopicity_at_80_RH": "excellent", "NMF_component": "no", "NMF_percentage_natural": "0",…
ph_stability
{"optimal_ph_min": "4.5", "optimal_ph_max": "7.5", "stable_ph_min": "4.0", "stable_ph_max": "8.0", "degrades_above_ph": "8.5", "degrades_below_ph": "3.5", "ph_dependent_function": "Protein hydrolysate; conditioning", "formulation_note": "pH affects solubility", "source": "Formulation literature"}
polymer
{"cas_number": "977062-89-1", "ingredient_class": "film_former/conditioning", "polymer_type": "protein_based", "chemical_backbone": "amide", "ionic_character": "nonionic", "pH_viscosity_sensitivity": "moderate", "salt_tolerance": "moderate", "electrolyte_effect_on_viscosity": "moderate", "temperature_viscosity_sensitivity": "moderate", "film_transparency": "transparent", "removability": "easy", "f…
regulatory
{"eu_status": "allowed", "us_status": "allowed"}
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Anti-static agent
Humectant
Softener and conditioner
Regulatory List Membership (2)
EU Regulated in Personal Care
EU Restricted for Children (Cosmetics)
Expert Verdict
Expert safety assessment and concern-level summary for Silk Amino Acids.
Regulatory Flags
eu_children_restricted
Chemical Function
Humectant
Anti-static agent
Softener and conditioner
Regulatory Lists
Europe; Personal care
Europe; Personal care
children; Europe; Personal care
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Silk Amino Acids allowed in the EU?
Silk Amino Acids EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Silk Amino Acids do in cosmetics?
Silk Amino Acids functions as: Skin Conditioning, Hair Conditioning, Humectant. It is classified as a cosmetic ingredient in our database. CAS number: 96690-41-4.
Is Silk Amino Acids used outside cosmetics?
Silk Amino Acids also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check Silk Amino Acids compliance across multiple jurisdictions:
Ingredient Decoder
Paste a full ingredient list for instant analysis
82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
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