Overview
ASTM D4079-00(2022) - Standard Specification for Vapor-Degreasing Grade Methylene Chloride establishes requirements and testing methods for methylene chloride (dichloromethane) used in vapor degreasing processes. Developed by ASTM International, this standard ensures that vapor-degreasing grade methylene chloride meets specific property criteria to support safe and effective industrial cleaning applications. It also emphasizes compliance with safety, health, and environmental regulations.
Key Topics
- Material Specification: Defines vapor-degreasing grade methylene chloride for industrial use, focusing on its purity and suitability for vapor degreasing.
- Test Methods: Specifies laboratory methods for verifying physical and chemical properties, including:
- Specific gravity (ASTM D2111)
- Distillation range, initial boiling point, and dry point (ASTM D1078)
- Acidity (ASTM D2989)
- Water content (ASTM D3401)
- Color (ASTM D2108, Platinum-Cobalt scale)
- Nonvolatile residue (ASTM D2109)
- Acid acceptance (ASTM D2942)
- Appearance (ASTM D3741)
- Property Requirements: Ensures the methylene chloride is clear, low in moisture, minimal in acidity and nonvolatile residues, and meets defined specific gravity and color parameters.
- Packaging and Labeling: Requires packaging and labeling in accordance with US Department of Transportation (49 CFR Parts 100-199) and OSHA Hazard Communication standards (29 CFR 1910.1200).
Applications
Vapor-degreasing grade methylene chloride is widely used in:
- Industrial Vapor Degreasing: As a solvent for cleaning and degreasing metal parts. Its low boiling point and nonflammability make it ideal for removing oils, greases, and other contaminants from components before finishing or assembly.
- Precision Component Manufacturing: Cleaning sensitive parts in the automotive, aerospace, electronics, and machinery sectors, where trace residues could affect performance.
- Solvent Recovery Systems: Under controlled conditions, used in systems designed for recycling and safe reuse.
- Research and Laboratory Use: Where a high-purity, well-characterized solvent is necessary.
Related Standards
To ensure comprehensive safety and quality in vapor degreasing operations with methylene chloride, the following ASTM standards are referenced:
- ASTM D1078 - Test Method for Distillation Range of Volatile Organic Liquids
- ASTM D2108 - Test Method for Color of Halogenated Organic Solvents and Their Admixtures
- ASTM D2109 - Test Methods for Nonvolatile Matter in Halogenated Organic Solvents and Their Admixtures
- ASTM D2111 - Test Methods for Specific Gravity and Density of Halogenated Organic Solvents and Their Admixtures
- ASTM D2942 - Test Method for Total Acid Acceptance of Halogenated Organic Solvents
- ASTM D2989 - Test Method for Acidity-Alkalinity of Halogenated Organic Solvents and Their Admixtures
- ASTM D3401 - Test Methods for Water in Halogenated Organic Solvents
- ASTM D3741 - Test Methods for Appearance of Admixtures Containing Halogenated Organic Solvents
Additional guides and practices relevant to vapor degreasing and worker safety include:
- ASTM D3844 - Guide for Labeling Chlorinated Hydrocarbon Solvent Containers
- ASTM D4276 - Practice for Confined Area Entry
Practical Value
This standard delivers significant practical value by:
- Ensuring solvent quality suited for precision cleaning in critical industries.
- Supporting regulatory compliance with packaging and labeling requirements.
- Providing clear testing and acceptance criteria to minimize operational risks.
- Facilitating effective equipment maintenance and improved product reliability by certifying cleaning effectiveness.
Compliance with ASTM D4079-00(2022) helps organizations maintain high cleaning standards, meet industry regulations, and protect both workers and the environment when handling vapor-degreasing grade methylene chloride.