Agrochemicals

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-diol
• Synonyms: DMHD; Acetylenic diol
• CAS Number: 142-30-3
• Molecular Formula: C₈H₁₄O₂
• Molecular Weight: 142.20 g/mol
• Appearance: White crystalline solid
• Odor: 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 soluble
  • Organic solvents: Soluble in ethanol, acetone, ether
• Flash 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 classified
• NFPA Rating: Health 1, Flammability 1, Reactivity 0

4. Storage and Handling

• Storage:
  • Keep in tightly closed containers
  • Store in a cool, dry, well-ventilated area
• Handling:
  • Use gloves (nitrile) and safety goggles
  • Avoid dust formation

5. Applications

• Chemical Intermediate: Used in organic synthesis
• Surfactant: Acts as a wetting agent
• Polymer Industry: Cross-linking agent

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