Product Description

1. Chemical Overview

• IUPAC Name: 2-Methyl-1,3-propanediol

• Synonyms: MPD, Methylpropyleneglycol

• CAS No.: 2163-42-0

• Molecular Formula: C₄H₁₀O₂

• Molecular Weight: 90.12 g/mol

• Structure: A diol with hydroxyl groups at positions 1 and 3 and a methyl branch at position 2.

2. Physical & Chemical Properties

• Appearance: Colorless, slightly viscous liquid.

• Odor: Mild, characteristic.

• Boiling Point: ~212°C (at 101.3 kPa).

• Melting Point: ~-50°C.

• Density: 1.02–1.04 g/cm³ (20°C).

• Solubility: Miscible with water, alcohols (ethanol, methanol), acetone, and other polar solvents.

• Refractive Index: ~1.44 (20°C).

• Viscosity: ~150 cP (25°C).

• Hygroscopicity: Absorbs moisture from air.

3. Key Applications

① Polymers & Resins

• Unsaturated Polyester Resins (UPR): Improves flexibility and hydrolytic stability.

• Polyurethanes (PU): Acts as a chain extender or crosslinker for elastomers, coatings, and adhesives.

• Alkyd Resins: Enhances durability in paints and coatings.

② Cosmetics & Personal Care

• Humectant: Retains moisture in skin/haircare products (e.g., lotions, creams).

• Solvent: Carries active ingredients in serums or cleansers.

• Viscosity Modifier: Adjusts texture in shampoos or gels.

③ Industrial Uses

• Antifreeze: Low-toxicity alternative to ethylene glycol in niche applications.

• Lubricants: Used in synthetic lubricant formulations.

• Chemical Intermediate: For synthesizing plasticizers, esters, or pharmaceuticals.

④ Electronics

• Cleaning Agent: Solvent for precision cleaning in electronics manufacturing.

4. Safety & Handling

• Toxicity: Low acute toxicity (LD₅₀ oral, rat: >2,000 mg/kg); may cause mild eye/skin irritation.

• Flammability: Combustible (flash point ~110°C).

• Protective Measures: Use gloves (nitrile), safety goggles, and ensure ventilation.

• Storage: Keep in sealed containers away from heat/oxidizers.

• Regulatory Status: Complies with REACH, FDA (for specific grades), and cosmetic safety standards.

5. Commercial Availability

• Grades: Industrial (≥99%), Cosmetic (high-purity, low impurities).

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6. Environmental & Regulatory Notes

• Biodegradability: Readily biodegradable (OECD 301 standards).

• Ecotoxicity: Low risk to aquatic life (based on OECD 201/202 tests).

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7. Why Choose MPD?

• Versatility: Balances hydrophilicity and solvent power.

• Performance: Enhances polymer flexibility and moisture retention.

• Safety Profile: Preferred over toxic glycols (e.g., ethylene glycol) in cosmetics.

  
  

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