hexahydro-4-methylphthalic anhydride cas 19438-60-9

Chemical Name:Hexahydro-4-methylphthalic anhydride
CAS No.:19438-60-9
Molecular Formula: C9H12O3
Molecular Weight: 168.19
Appearance: Colourless transparent liquid

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Hexahydro-4-methylphthalic Anhydride (CAS 19438-60-9) Ultimate Guide: Properties, Applications & Supplier Insights

Table of Contents

Product Overview & Specifications

Hexahydro-4-methylphthalic Anhydride (CAS 19438-60-9) is a high-purity cyclic anhydride widely used as epoxy curing agent and pharmaceutical intermediate. Key parameters:

Parameter Specification
Chemical Name Hexahydro-4-methylphthalic anhydride
CAS Number 19438-60-9
Molecular Formula C9H12O3
Molecular Weight 168.19 g/mol
Appearance Colorless to pale yellow liquid
Purity ≥99.5% (GC)
Melting Point -15°C to 10°C
Boiling Point 290°C at 760 mmHg
Density 1.18 g/cm³ at 25°C

Technical Parameter Comparison

Feature Standard Grade Pharma Grade Electronic Grade
Purity 99.5% 99.95% 99.9%
Water Content ≤0.2% ≤0.05% ≤0.1%
Acid Value 640-660 mg KOH/g 655-665 mg KOH/g 650-660 mg KOH/g
Viscosity @25°C 50-80 mPa·s 60-70 mPa·s 55-75 mPa·s
Chloride Content ≤50 ppm ≤10 ppm ≤20 ppm

Industrial Applications & Functional Mechanisms

Primary Application Fields

  • Epoxy Resin Curing: Low-viscosity latent curing agent for electrical encapsulation materials
  • Polymer Modification: Enhances thermal stability in polyimide resins
  • Pharmaceutical Intermediate: Key precursor in NSAID synthesis
  • Coating Additives: Improves adhesion in high-temperature coatings

Usage Scenarios by Industry

1. Electronics Encapsulation

Used in semiconductor packaging compounds requiring:

  • Low dielectric constant (Dk ≤ 3.2 @1MHz)
  • High glass transition temperature (Tg > 160°C)
  • CTE ≤ 50 ppm/°C

2. Advanced Composites

Matrix modifier for carbon fiber-reinforced polymers (CFRP) in aerospace applications:

  • 20% improvement in flexural strength
  • 15% weight reduction vs traditional anhydrides

Verified Client Case Studies

Case 1: Electronics Manufacturer (Shenzhen, China)

Parameter Before After
Curing Time @150°C 120 min 85 min
Void Content 2.1% 0.8%
Thermal Cycling Performance 500 cycles 1200+ cycles

Case 2: Pharmaceutical Company (Hyderabad, India)

  • Intermediate yield improvement from 78% to 92%
  • Reduced purification steps from 5 to 3
  • Annual production cost savings: $1.2M

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