2,5-Dimethyl-3-hexyne-2,5-diol

2,5-Dimethyl-3-hexyne-2,5-diol (CAS No. 142-30-3) 

1. Basic Information

Chemical Name: 2,5-Dimethyl-3-hexyne-2,5-diolSynonyms: DMHD; Acetylenic diolCAS Number: 142-30-3Molecular Formula: C₈H₁₄O₂Molecular Weight: 142.20 g/molAppearance: White crystalline solidOdor: Mild, characteristic odor

2. Physical and Chemical Properties

Melting Point: 94–97°C (201–207°F)Boiling Point: 205–208°C (401–406°F)Density: 1.02 g/cm³ (at 20°C)Solubility:Water: Slightly solubleOrganic solvents: Soluble in ethanol, acetone, etherFlash Point: 110°C (230°F) (closed cup)Refractive Index: 1.472 at 20°C

3. Hazards (GHS Classification)

Health Hazards:Causes eye irritation (H319)May cause respiratory irritation (H335)Environmental Hazards: Not classifiedNFPA Rating: Health 1, Flammability 1, Reactivity 0

4. Storage and Handling

Storage:Keep in tightly closed containersStore in a cool, dry, well-ventilated areaHandling:Use gloves (nitrile) and safety gogglesAvoid dust formation

5. Applications

Chemical Intermediate: Used in organic synthesisSurfactant: Acts as a wetting agentPolymer Industry: Cross-linking agent

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