Moderate Cosmetic Ingredient NOAEL Data

Hydroxydichlorodiphenyl Ether (Diclosan)

Also known as: Snoclosan, UNII-814H7B74XK

INCI: HYDROXYDICHLORODIPHENYL ETHER

Hydroxydichlorodiphenyl Ether (Diclosan) (CAS 3380-30-1) is a cosmetic cosmetic ingredient functioning as Antimicrobial / preservative. Reported NOAEL =20 mg/kg bw/day in Rat (ToxValDB_ECHA_IUCLID); EU Regulation 1223/2009 status: restricted, max 0.3%. 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 3380-30-1 →

Auto-generated CPSR Part A draft with source citations
Function
Antimicrobial / preservative
Safety Rating
MODERATE

Chemistry & Identifiers

Formula
C12H8Cl2O2
MW
255.09 g/mol
EC Number
429-290-0
PubChem CID
18807
IUPAC Name
5-chloro-2-(4-chlorophenoxy)phenol
InChIKey
BYNQFCJOHGOKSS-UHFFFAOYSA-N

Regulatory Status

EU EU Status restricted
EU Max Conc. 0.3%
US US Status restricted
US Notes Permitted in cosmetics under 21 CFR; however, FDA increased scrutiny on chlorinated antimicrobials post-2016 triclosan rule

For full compliance data across multiple jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety, dermal absorption, and sensitization profile summaries for Hydroxydichlorodiphenyl Ether (Diclosan).

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

3 study endpoints found for Hydroxydichlorodiphenyl Ether (Diclosan). NOAEL (No Observed Adverse Effect Level) values are used to calculate the Margin of Safety per SCCS methodology.

Endpoint Value Route Species Study Type Source
NOAEL =20 mg/kg bw/day oral Rat chronic ToxValDB_ECHA_IUCLID
NOAEL =30 mg/kg bw/day dermal Rat short-term ToxValDB_ECHA_IUCLID
NOAEL =150 mg/kg bw/day oral Rat short-term ToxValDB_ECHA_IUCLID

EU CLP Annex VI Harmonized Classification

Legally binding harmonized classification per Regulation (EC) No 1272/2008 (CLP) Annex VI.

Signal Word
Danger
Pictograms
CorrosiveEnvironmental Hazard
Hazard Class and Category
Eye Dam. 1; Aquatic Acute 1; Aquatic Chronic 1
Hazard Statements
  • H318 Causes serious eye damage
  • H400 Very toxic to aquatic life
  • H410 Very toxic to aquatic life with long lasting effects
Specific Concentration Limits / M-factors
M = 10; M = 10

Inserted via ATP: ATP10

ECHA REACH Registration

European Chemicals Agency REACH dossier and Substances of Very High Concern listing.

Registration Type
Full
Tonnage Band
Ceased manufacture
Substance Type
SUBSTANCE
SVHC Candidate
No
Hazard classification: Restricted (Annex XVII)

PubChem Annotations

Safety and regulatory annotations from PubChem (NCBI) aggregated sources.

Safety (1)
Endocrine Disruptors
Potential endocrine disrupting compound
Source: NORMAN Suspect List Exchange

Function Categories & List Membership

Cosmetic/Chemical Function Categories
Biocide

Expert Verdict

Expert safety assessment and concern-level summary for Hydroxydichlorodiphenyl Ether (Diclosan).

Regulatory Flags

preservative

NOAEL Studies Summary

View details ->

Public NOAEL study rows linked to Hydroxydichlorodiphenyl Ether (Diclosan) by CAS number or substance name.

Studies
3
Lowest NOAEL
20 mg/kg bw/day
Highest NOAEL
150 mg/kg bw/day
ToxValDB_ECHA_IUCLID

Known Synonyms

Snoclosan UNII-814H7B74XK

Chemical Function

Biocide

Regulatory Lists

active_ingredient; Europe; Pesticides active_ingredient; Europe; Pesticides pharmaceutical Canada; pharmaceutical

Australian Status

AICIS status: listed_with_terms

Specific information requirements: Obligations to provide information apply. These obligations are: 1. If the assessment report about the chemical recommends secondary notification of the chemical in particular circumstances and any of the circumstances occur in relation to the introduction (importation or manufacture) of the chemical by a person, then the...

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.

Compound
SONECLOSAN
ChEMBL ID
CHEMBL1232142
Max Phase
2
View full pharmaceutical profile →

Frequently Asked Questions

Is Hydroxydichlorodiphenyl Ether (Diclosan) safe in cosmetics?

Hydroxydichlorodiphenyl Ether (Diclosan) has a safety rating of "MODERATE" in our database. EU status: restricted. US status: restricted. 3 toxicological study endpoint(s) are available in our database.

Is Hydroxydichlorodiphenyl Ether (Diclosan) allowed in the EU?

Hydroxydichlorodiphenyl Ether (Diclosan) EU regulatory status: restricted. Maximum allowed concentration: 0.3%. This is based on EU Regulation 1223/2009 and its amendments.

What does Hydroxydichlorodiphenyl Ether (Diclosan) do in cosmetics?

Hydroxydichlorodiphenyl Ether (Diclosan) functions as: Antimicrobial / preservative. It is classified as a cosmetic ingredient in our database. CAS number: 3380-30-1.

What is the NOAEL for Hydroxydichlorodiphenyl Ether (Diclosan)?

The NOAEL (No Observed Adverse Effect Level) for Hydroxydichlorodiphenyl Ether (Diclosan) is =20 mg/kg bw/day based on a chronic study via oral route in Rat. A total of 3 study endpoints are available. Source: ToxValDB_ECHA_IUCLID.

Is Hydroxydichlorodiphenyl Ether (Diclosan) used outside cosmetics?

Hydroxydichlorodiphenyl Ether (Diclosan) 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 Hydroxydichlorodiphenyl Ether (Diclosan) have different safety status in cosmetics vs industrial chemicals?

Hydroxydichlorodiphenyl Ether (Diclosan) is classified GHS Danger (H318, H400, H410) in the chemicals database but is restricted in EU cosmetics at max 0.3%.

Is Hydroxydichlorodiphenyl Ether (Diclosan) in Your Products?

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