Basic Information of Isooctanoic acid CAS 25103-52-0

Standard Name: Isooctanoic Acid (Systematic Name: 6-Methylheptanoic Acid)

CAS：25103-52-0

EINECS：246-617-0

Molecular formula: C8H16O2

Molecular weight: 144.21

Category: Branched-chain saturated C8 fatty acids

Physical and Chemical Properties

Appearance: Colorless to light yellow, transparent oily liquid with a mild oily odor

Boiling point: 228~235°C

Flash point: 116.6°C

Refractive index: 1.433

Solubility: Slightly soluble in water, soluble in organic solvents such as ethanol, ether, and hydrocarbons

Acidic: a medium-strength organic acid that readily reacts with metals and alkalis to form isovalerate salts

Stability: Stable at room temperature, not easily volatile; reacts with strong oxidizers

Core Product Advantages

The branched structure exhibits excellent solubility of metal salts, with superior drying and stabilizing effects compared to rosinates;

Good thermal stability, with minimal metal salt precipitation and yellowing resistance;

The synthetic route is well-established, with a purity exceeding 99.5% and low impurity levels.

Primary Industrial Applications

Coatings and Ink Industry (Primary Application)

PVC Plastic Processing
Barium / Cadmium / Zinc / Tin iso-stearate, used as a thermal stabilizer for PVC, inhibits high-temperature decomposition and is suitable for pipes, films, and calendered products.

Pharmaceutical intermediates
Key raw material for producing antibiotics such as carbenicillin and ampicillin; specialized salting agent for sodium penicillin preparation via solvent method.

Fine Chemical Additives
Glycerides and alcohol esters are used as plasticizers and base materials for fragrances in cosmetics;
Metal cutting lubricants, gasoline anti-knock additives, bactericides, and preservatives;
Resin synthesis catalyst, rubber thickening gel agent.

Mainstream Quality Specifications (Industrial Premium Grade)

Main content: ≥99.0%

Moisture: ≤0.10%

Color (Pt-Co): ≤15#

Acid value: ≥385 mgKOH/g

Packaging, Storage, Transportation, and Safety 

Packaged in 200kg blue plastic drums or galvanized iron drums, with 16 tons per container. Inner lining is sealed to prevent leakage.

Store and transport in sealed conditions in cool, ventilated warehouses, away from open flames and oxidizers. It is a stimulating organic acid, not a highly toxic hazardous chemical, but classified as corrosive and irritating cargo. 

Safety Precautions: It may irritate the skin, eyes, and respiratory tract. Wear acid-resistant and alkali-resistant gloves, goggles, and anti-toxic masks during handling. Avoid mixing with strong alkalis during storage or transportation.

Conclusion

This batch of Isooctanoic Acid (CAS 25103-52-0) complies with HG/T 5719-2020 industrial standard, assay ≥99.0%. Qualified for paint driers, PVC heat stabilizers, pharmaceutical intermediates, metal lubricants and fine chemical synthesis.

QA Authorized Signature: ____________

QA Manager: 

Official Stamp: TNJ CHEMICAL

Packing & Storage Remarks

Packing: 200kg net per sealed galvanized iron drum.

Storage: Store in cool, dry, ventilated warehouse, tightly sealed. Keep away from strong alkalis, oxidants, open flame and high temperature.

Shelf life: 24 months under original intact packaging.