Adipic acid
Adipic acid (CAS: 124-04-9), a dicarboxylic acid with the linear formula HOOC(CH2)4COOH and a molecular weight of 146.14 g/mol, is a white crystalline solid. It is primarily utilised as a precursor in the synthesis of nylon 6,6 and other polymers. It also finds application as a plasticiser, in food additives as an acidity regulator, and in various chemical manufacturing processes.
- IUPAC
- Hexanedioic acid
- Synonyms
- Hexanedioic acid

Nylon 6,6 Precursor
Adipic acid is a key monomer in the production of Nylon 6,6, a widely used polyamide known for its strength and durability. This polymer is essential for textiles, automotive parts, and industrial components.
Polymer and Plasticiser Production
Beyond nylon, it serves as a building block for other polymers and is used to produce plasticisers, which enhance the flexibility and workability of plastics.
Food Acidity Regulator
In the food industry, adipic acid acts as an acidity regulator and buffering agent, contributing to the flavour profile of various food products.
Chemical Synthesis Intermediate
Its dicarboxylic acid structure makes it a versatile intermediate in organic synthesis for creating a range of specialty chemicals and reagents.
| Molecular weight | 146.14 |
|---|---|
| Linear formula | HOOC(CH2)4COOH |
| Assay | ≥99.0% (HPLC) |
| Grade | SAJ special grade |
| Boiling point | 265 °C/100 mmHg(lit.) |
| Solubility | methanol: soluble0.1 g/mL, clear, colorlessH2O: slightly solubleacetone: solublebenzene: insolubleboiling water: solublecyclohexane: slightly solubleethanol: freely solublemethanol: freely solublepetroleum ether: insoluble |
| Vapour pressure | 1 mmHg (159.5 °C) |
| Melting point | 151-154 °C(lit.)151-154 °C |
| Vapour density | 5 (vs air) |
| Autoignition temp | 788 °F |

Hazard statements
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | 196 °C / 384.8 °F |
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 41 |
| Safety statements (S) | 26-39 |
| Ignition residue | ≤0.05% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Availability | available only in Japan |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Adipic Acid used for?
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Adipic acid is predominantly used as a key monomer in the production of Nylon 6,6, and also finds applications in manufacturing other polymers, plasticisers, and as a food acidity regulator. It is also an important intermediate in chemical synthesis.
What is the CAS number and formula for Adipic Acid?
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The CAS number for Adipic Acid is 124-04-9 and its linear formula is HOOC(CH2)4COOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Adipic Acid in SAJ special grade with a purity of ≥99.0% (HPLC). We do not represent this product as USP, BP, or EP grade.
How should Adipic Acid be handled safely?
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Adipic Acid carries a danger signal word and a hazard statement (H318) for serious eye damage. Recommended personal protective equipment includes a dust mask (NIOSH type N95), eyeshields, and gloves. Always consult the Safety Data Sheet (SDS) before handling.
Is Adipic Acid available for export?
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Adipic Acid is currently available only in Japan. Please contact TSS for specific export inquiries or alternative product sourcing.
How can I request a quote or sample?
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To request a quote or sample of Adipic Acid, please contact our sales team through the website or your designated account manager.
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