Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Info
Name: Octane-1,8-diol
Alias: 1,8-Octanediol
CAS No.: 629-41-4
Molecular Formula: C8H18O2
Molecular Weight: 146.23
2. Physical & Chemical Properties
Physical Properties
- Appearance: White flaky crystalline solid
- Odor: Odorless
- Solubility: Slightly soluble in cold water, soluble in hot water, ethanol, methanol, acetone; insoluble in alkane, benzene
- Melting Point: 60–63 ℃
- Boiling Point: 277–280 ℃
- Density (65 ℃ molten state): 0.917 g/cm3
- Hygroscopy: Slightly hygroscopic under high humidity
- Crystal form: Flaky crystal recrystallized from water or ethanol
Chemical Properties
- Molecular structure: Straight-chain aliphatic diol with hydroxyl groups at both ends of C8 alkane chain
- Esterification reaction: Two hydroxyl groups can react with monocarboxylic acid / dicarboxylic acid to generate monoester, diester and polyester
- Etherification: React with alkyl halide to form diether derivatives under alkaline catalysis
- Dehydration: Dehydrate under strong acid heating to form cyclic ether or octadiene
- Oxidation: Oxidized to octanedial or octanedioic acid by strong oxidants
- Thermal stability: Stable below 220 ℃; high temperature above 290 ℃ cracking occurs
- Compatibility: Compatible with polar solvents, polyols, resin monomers; avoid long-term contact with strong oxidants and concentrated strong acid
3. Main Application Fields
1. Polyester & Polyurethane Synthetic Monomer (Core Application)
- Long-chain diol monomer for biodegradable aliphatic polyester, waterborne polyurethane resin
- Modify polymer flexibility, improve low-temperature resistance and softness of coating film
2. Cosmetic Functional Raw Material
- Humectant, penetration enhancer for skin care cream, essence, mask
- Antimicrobial auxiliary raw material in personal care formulations
3. Organic Synthetic Intermediate
- Precursor for synthesizing octanedioic acid, difunctional ester fine chemicals
- Chain extender for polyamide, polyether synthesis
4. Pharmaceutical Intermediate
Raw material for synthesizing long-chain ester drug carriers and macromolecular sustained-release materials
5. Coating & Ink Additive
Improve film flexibility and leveling property of water-based coatings
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 629-41-4 |
| Molecular Formula | C8H18O2 |
| Molecular Weight | 146.23 |
| Appearance | White flaky crystal |
| GC Purity | Synthetic Grade ≥99.0%; Cosmetic Grade ≥99.5% |
| Melting Range | 60.0–63.0 ℃ |
| Moisture Content (KF) | ≤0.15% |
| Residue on Ignition | ≤0.05% |
| Heavy Metals (Pb) | Cosmetic grade ≤10 ppm |
| Bulk Package | 25kg PE lined fiber drum, light-proof packaging |
| Storage Condition | Hermetic cool dry warehouse ≤25℃; prevent moisture absorption |
| Transportation Rule | Aliphatic diol solid, sealed moisture-proof packaging |
| Shelf Life | 24 months under intact sealed packaging |
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