Definition
US FDA substance register · UNII VK98I9YW5M · registered name ADIPIC ACID DIHYDRAZIDE · single chemical substance
Cosmetic roles
Safety & regulatory references
- Banned
- Argentina · ASEAN · Brazil · Canada · China · European Union · South Korea · Taiwan
Source: ASEAN Cosmetic Directive · Health Canada Cosmetic Ingredient Hotlist · MFDS (Korea) cosmetic regulatory information
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
Health Canada Cosmetic Ingredient Hotlist · prohibited in cosmetics
Restriction II/200
Source: EU CosIng ingredient list
Reviewed by CIR: Final Report on the Safety Assessment of Adipic Acid Dihydrazide
CIR reviewed this ingredient and flagged its status as: Insufficient data ingredients with no uses reported to FDA's Voluntary Cosmetic Registration Program (VCRP) (insufficient data or use not supported — CIR's own classification, not a full safety-as-used conclusion).
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 1071-93-8
- EC No.EU chemical inventory number
- 213-999-5
- DTXSIDUS EPA chemical ID
- DTXSID0044361
- DTXCIDUS EPA compound ID
- DTXCID8024361
- IUPAC
- Hexanedihydrazide
- Molecular formula
- C6H14N4O2
- Molecular weight
- 174.204 g/mol
Measured properties
- Appearance
- Dry Powder, Large Crystals, Liquid · solid
- Colour
- white
- Melting/freezing point
- 181.8 ℃
- Flash point
- &, gt, 150 ℃
- Water solubility
- 328700 ㎎/ℓ
- n-Octanol/water partition coefficient (Kow)
- -2.05
- Molecular weight
- 174.20
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: PubChem · KOSHA safety data sheets (Korea)
What products actually use it for
What the 24 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Chemical reaction regulator11
- Hardener3
- Processing aids not otherwise specified3
- Humectant1
- Deodorizer1
- Adhesion/cohesion promoter1
- Viscosity modifier1
- Binder1
2 other uses
- Plasticizer1
- No specific technical function1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
4 skin studies and 1 eye studies are on record.
The studies disagree (the most common conclusion covers 33%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 5 studies
- Not likely to be sensitizing
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) - High Frequency of Sensitization
skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation) - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion) according to - High Frequency of Sensitization
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) according to EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay) - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) according to
Source: US EPA CompTox dashboard
Related literature
- An Injectable Hyaluronic Acid-Decellularized Matrix Hydrogel for Full-Thickness Skin Regeneration · 2026
- A dual network cross-linked hydrogel with multifunctional Bletilla striata polysaccharide/gelatin/tea polyphenol for wound healing promotion. · 2024
- Hyaluronic Acid Derivative Molecular Weight-Dependent Synthesis and Antimicrobial Effect of Hybrid Silver Nanoparticles · 2021
- Manufacture of pH- and HAase-responsive hydrogels with on-demand and continuous antibacterial activity for full-thickness wound healing. · 2020
- Regulation of inflammatory microenvironment using a self-healing hydrogel loaded with BM-MSCs for advanced wound healing in rat diabetic foot ulcers · 2020
Linked databases 18
- ASEAN Cosmetic Directive
- Australian Industrial Chemicals Inventory (AICIS)
- EU CosIng ingredient list 2
- Health Canada Cosmetic Ingredient Hotlist
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic regulatory information 2 3
- NIST Chemistry WebBook
- PubChem
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US Cosmetic Ingredient Review (CIR) 2 3
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · English · Japanese · Chinese