Is Potassium Cyanate safe in cosmetics?
Potassium Cyanate has a safety rating of "POOR" in our database. EU status: prohibited. US status: permitted.
Poor
Cosmetic Ingredient
Potassium Cyanate
Also known as: D & P Double O Crabgrass Killer, P.C. 80 crabgrass killer, D&P double O Crabgrass killer, Aero cyanate weedkiller, Bonide krab crabgrass killer (+13 more)
INCI: POTASSIUM CYANATE
Potassium Cyanate (CAS 590-28-3) is a cosmetic cosmetic ingredient functioning as Skin Conditioning (Emollient), Hair Conditioning. NOAEL 30 mg/kg bw/day (cross-referenced against ToxValDB ECHA IUCLID); EU Regulation 1223/2009 status: prohibited. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety and pharmaceutical data.
View industrial chemical safety profile for CAS 590-28-3 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Potassium Cyanate is prohibited in EU cosmetics but has active industrial GHS classifications (H302, H319, H412, H371).
Source: Cosmetics: ingredients.eu_status; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Skin Conditioning (Emollient), Hair Conditioning
Safety Rating
POOR
Chemistry & Identifiers
IUPAC Name
potassium cyanate
InChIKey
GKKCIDNWFBPDBW-UHFFFAOYSA-M
Regulatory Status
EU EU Status
prohibited
US US Status
permitted
US Notes
No specific restriction; not CIR-reviewed as a standalone ingredient. Primary industrial use is as herbicide precursor.
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Potassium Cyanate.
Calculate MoS for your specific formulation with the MoS Calculator.
Pre-Calculated Safety Assessment
Pre-calculated NOAEL → SED → MoS audit trail for Potassium Cyanate across SCCS product categories, with measured dermal absorption where available.
EU CLP Annex VI Harmonized Classification
Legally binding harmonized classification per Regulation (EC) No 1272/2008 (CLP) Annex VI.
Signal Word
Warning
Pictograms
Harmful / Irritant
Hazard Class and Category
Acute Tox. 4 *
Hazard Statements
- H302 Harmful if swallowed
Inserted via ATP: CLP00
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
1,000 - 10,000 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Hazard classification: Restricted (Annex XVII)
PubChem Annotations
Safety and regulatory annotations from PubChem (NCBI) aggregated sources.
Safety (2)
Carcinogen Classification
No indication of carcinogenicity to humans (not listed by IARC).
Source: Toxin and Toxin Target Database (T3DB)
Skin Eye Respiratory Irritation
Highly irritating to eyes, skin, and mucous membranes. /Cyanic acid/
Source: Hazardous Substances Data Bank (HSDB)
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Softener and conditioner
Expert Verdict
Expert safety assessment and concern-level summary for Potassium Cyanate.
NOAEL Studies Summary
View details ->Public NOAEL study rows linked to Potassium Cyanate by CAS number or substance name.
Studies
27
Lowest NOAEL
20 mg/kg bw/day
Highest NOAEL
300 mg/kg bw/day
ECHA_REACH_reach_study_results_dossiers_23-05-2023.zip
Known Synonyms
D & P Double O Crabgrass Killer
P.C. 80 crabgrass killer
D&P double O Crabgrass killer
Aero cyanate weedkiller
Bonide krab crabgrass killer
Caswell No. 688
Ded-weed crabgrass killer
Dupont PC crabgrass killer
EINECS 209-676-3
EPA Pesticide Chemical Code 068002
Green cross crabgrass killer
Miller P.C. weedkiller
NSC 146178
Weedanol cyanol
Weedone Crab Grass Killer
UNII-G9C31TWN5M
KOCN
Kaliumzyanat
Chemical Function
Softener and conditioner
Australian Status
AICIS status: listed
Cross-Vertical Safety Context
Same-CAS public records found in pharmaceutical data.
SOURCE
ChEMBL / DrugCentral / FAERS
DB_PHARMA CAS match
Pharmaceutical Data
Same-CAS rows from the pharmaceutical spoke database.
ChEMBL ID
CHEMBL4079232
Frequently Asked Questions
Is Potassium Cyanate allowed in the EU?
Potassium Cyanate EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.
What does Potassium Cyanate do in cosmetics?
Potassium Cyanate functions as: Skin Conditioning (Emollient), Hair Conditioning. It is classified as a cosmetic ingredient in our database. CAS number: 590-28-3.
Is Potassium Cyanate used outside cosmetics?
Potassium Cyanate also appears in industrial chemical safety and pharmaceutical data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Potassium Cyanate have different safety status in cosmetics vs industrial chemicals?
Potassium Cyanate is prohibited in EU cosmetics but has active industrial GHS classifications (H302, H319, H412, H371).
Compliance Tools
Check Potassium Cyanate 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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