Also known as: BRN 1703666, Caprylohydroxamic acid, EINECS 230-936-7, Octanoylhydroxamic acid, Taselin (+2 more)
INCI: CAPRYLHYDROXAMIC ACID
Caprylhydroxamic Acid (CAS 7377-03-9) is a cosmetic preservative functioning as preservative booster, chelating agent. Reported NOAEL =500 mg/kg bw/day in rat (CIR Safety Assessment); EU Regulation 1223/2009 status: permitted; 4 safety opinions reviewed (CIR Safety Assessment). Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
US NotesNo restrictions; widely used in clean and natural preservative systems
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Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Caprylhydroxamic Acid.
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Toxicological Studies
4 study endpoints found for Caprylhydroxamic Acid. 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
=500 mg/kg bw/day
oral
rat
developmental toxicity
CIR Safety Assessment
NOAEL
=500 mg/kg bw/day
oral
rat
developmental toxicity
CIR Safety Assessment
NOAEL
=500 mg/kg bw/day
oral
rat
developmental toxicity
CIR Safety Assessment
NOAEL
=500 mg/kg bw/day
oral
rat
developmental toxicity
CIR Safety Assessment
Safety Opinions
Official safety assessments from the Scientific Committee on Consumer Safety (SCCS) and Cosmetic Ingredient Review (CIR).
CIR Safety Assessment
Verdict: safe
NOAEL: 50 mg/kg bw/d (oral)
ation-induction-level (WoE NESIL) of 1056 μg/cm2. The Panel concluded that Caprylhydroxamic Acid is safe in cosmetics in the present practices of use and concentration described in this safety assessment. Keywords Cosmetic Ingredient Review, Expert Panel for Cosmetic Ingredient Safety, Safety, Cosmetics
CIR Safety Assessment
Verdict: safe
NOAEL: 50 mg/kg
bw/d (oral)
ation-induction-level (WoE NESIL) of 1056 μg/cm2. The Panel concluded that Caprylhydroxamic Acid is safe in cosmetics in the present practices of use and concentration described in this safety assessment. Keywords Cosmetic Ingredient Review, Expert Panel for Cosmetic Ingredient Safety, Safety, Cosmetics
CIR Safety Assessment
Verdict: safe
NOAEL: 500 mg/kg bw/d (oral)
ation-induction-level (WoE NESIL) of 1056 μg/cm2. The Panel concluded that Caprylhydroxamic Acid is safe in cosmetics in the present practices of use and concentration described in this safety assessment. Keywords Cosmetic Ingredient Review, Expert Panel for Cosmetic Ingredient Safety, Safety, Cosmetics
CIR Safety Assessment
Verdict: safe
NOAEL: 1.17 mg/kg bw/d (oral)
ation-induction-level (WoE NESIL) of 1056 μg/cm2. The Panel concluded that Caprylhydroxamic Acid is safe in cosmetics in the present practices of use and concentration described in this safety assessment. Keywords Cosmetic Ingredient Review, Expert Panel for Cosmetic Ingredient Safety, Safety, Cosmetics
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
Expanded Jurisdictional Detail
Additional regulatory detail beyond the 7-jurisdiction summary: Saudi SFDA, Korea MFDS, ASEAN ACD, Japan/Korea, Brazil/India, and cross-jurisdictional restriction entries.
Additional Jurisdictional Restrictions (1)
Jurisdiction
Status
Max %
Product Type
CN
permitted_preservative
-
All cosmetics (leave-on/rinse-off)
Additional Ingredient Properties
3 property records from structured ingredient metadata.
ph_stability
{"optimal_ph_min": "5.0", "optimal_ph_max": "7.0", "stable_ph_min": "4.0", "stable_ph_max": "8.0", "degrades_above_ph": "8.5", "degrades_below_ph": "3.5", "ph_dependent_function": "Chelator and preservative", "formulation_note": "Works with other systems", "source": "PMC 2023"}
Specific information requirements: Obligations to provide information apply. These obligations are: 1. A person introducing this chemical must tell us in writing within 28 calendar days if any of the following circumstances have occurred in relation to their introduction (importation or manufacture): a. the introduction volume of the chemical exceeds 1...
Frequently Asked Questions
Is Caprylhydroxamic Acid safe in cosmetics?
Caprylhydroxamic Acid has a safety rating of "EXCELLENT" in our database. EU status: permitted. US status: permitted. 4 toxicological study endpoint(s) are available in our database. This ingredient has been reviewed by CIR Safety Assessment.
Is Caprylhydroxamic Acid allowed in the EU?
Caprylhydroxamic Acid EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Caprylhydroxamic Acid do in cosmetics?
Caprylhydroxamic Acid functions as: preservative booster, chelating agent. It is classified as a Preservative in our database. CAS number: 7377-03-9.
What is the NOAEL for Caprylhydroxamic Acid?
The NOAEL (No Observed Adverse Effect Level) for Caprylhydroxamic Acid is =500 mg/kg bw/day based on a developmental toxicity study via oral route in rat. A total of 4 study endpoints are available. Source: CIR Safety Assessment.
Is Caprylhydroxamic Acid used outside cosmetics?
Caprylhydroxamic Acid 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
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