Is Cytosine safe in cosmetics?
Cytosine has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
MODERATE
Cosmetic Ingredient
Cytosine
INCI: CYTOSINE
Cytosine (CAS 71‑30‑7) is a cosmetic cosmetic ingredient functioning as Nucleobase; rarely used directly in cosmetics but may appear in biotech. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database.
Function
Nucleobase; rarely used directly in cosmetics but may appear in biotech actives, DNA/RNA-based or cell communication concepts
Editorial assessment
MODERATE
Preliminary editorial note — not a computed safety verdict.
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Not listed as prohibited; any cosmetic use must be supported by robust safety data; cytosine is primarily a lab chemical, not an established cosmetic ingredient
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Cytosine.
Calculate MoS for your specific formulation with the MoS Calculator.
Editorial summary
Preliminary editorial summary for Cytosine — not a computed safety verdict. See the sourced toxicological data above.
Frequently Asked Questions
Is Cytosine allowed in the EU?
Cytosine EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Cytosine do in cosmetics?
Cytosine functions as: Nucleobase; rarely used directly in cosmetics but may appear in biotech actives, DNA/RNA-based or cell communication concepts. It is classified as a cosmetic ingredient in our database. CAS number: 71‑30‑7.
Compliance Tools
Check Cytosine 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
Related Ingredients
Acrylates/Vinyl Neodecanoate Crosspolymer
EXCELLENT
Same category
Emulsion stabilising, film forming
Adipic Acid
EXCELLENT
Same category
Buffering
Aluminum Magnesium Oxide
EXCELLENT
Same category
Absorbent, bulking agent, opacifying ...
Ammonium VA/Acrylates Copolymer
EXCELLENT
Same category
Antistatic, binding, film forming, ha...
Ammonium VA/Crotonic Acid Copolymer
EXCELLENT
Same category
Antistatic, film forming, hair fixing...
Aphanothece Sacrum Polysaccharide
EXCELLENT
Same category
Absorbent, emulsion stabilising, film...
(20S)-Protopanaxadiol
MODERATE
Similar safety
(Cnidium Officinale/Coptis Chinensis/Glycyrrhiza Uralensis) Root Extract
MODERATE
Similar safety
Skin conditioning
(Cryptomeria Japonica/Chamaecyparis Obtusa) Stem Ferment Extract
MODERATE
Similar safety
Antimicrobial, antioxidant, humectant
(Eclipta Prostrata/Houttuynia Cordata) Leaf Extract
MODERATE
Similar safety
Skin conditioning
(Lepidium Meyenii/Sarcodon Aspratus) Root Water
MODERATE
Similar safety
Skin conditioning
(Licorice/Reynoutria Japonica) Root/Stem Extract
MODERATE
Similar safety
Skin conditioning, antioxidant
Cacay Seed Oil (Caryodendron Orinocense)
MODERATE
Browse nearby
Emollient, skin conditioning
Cadinene
GOOD
Browse nearby
Fragrance
Caesalpinia Benthamiana Root Extract
MODERATE
Browse nearby
Skin conditioning
Is Cytosine in Your Products?
Scan any product label with Piro — our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.
Try Piro Free →Analyze Your Full Ingredient List
Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Cytosine in your formulation.