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D5394-02 – Standard Test Method Technical Guide
Reclaimed 1,1,1-trichloroethane, also commercially known as methyl chloroform, is a recovered solvent processed for reuse in industrial cleaning. ASTM D5394-02 (Reapproved 2012) establishes the official specification for this reclaimed material, defining distinct quality grades to ensure consistent performance. The standard specifies the required property limits, referenced test methods, and critical safety precautions for handling the reclaimed solvent.
🧪 Scope and Classification
The scope of D5394 categorizes reclaimed solvent into three specific types based on quality and application. Type I is designated as high quality reclaimed solvent approximating military (MIL) specifications. Type II covers good quality reclaimed solvent suitable for vapor degreasing, with detailed guidance provided in STP-310A. Type III defines the minimal acceptable reclaimed solvent quality for cold cleaning operations outlined in STP-403A.
| 🟦 Type | 📏 Classification | 📐 Specification Source |
|---|---|---|
| Type I | High Quality | Approximates MIL Spec (Table 1) |
| Type II | Good Quality | Refer to STP-310A (Table 2) |
| Type III | Minimal Acceptable | Refer to STP-403A (Table 3) |
📋 Key Measured Properties
Adherence to the standard requires rigorous evaluation of specific physical and chemical properties. The typical specific gravity for reclaimed grades of 1,1,1-trichloroethane is between 1.25 and 1.37. A broad suite of ASTM test methods is referenced for comprehensive characterization of the solvent quality.
| 🎯 Property | ⚡ Reference Test Method |
|---|---|
| Nonvolatile Matter | D2109 |
| Acidity / Alkalinity | D2989 |
| Water Content | D3401 |
| Color (Platinum-Cobalt Scale) | D2108 |
| Stability (Aluminum Scratch) | D2943 |
| Amine Acid Acceptance | D2106 |
| Water-Soluble Halide Ion | D2988 |
| Composition / Purity (GC) | D6806 |
💡 Reminder: While the specification does not prescribe a specific flash point limit for the grades, it mandates that the flash point must be determined for proper labeling and shipping. The Tag closed-cup procedure is the recommended method for this determination.
⚠️ Safety and Handling Hazards
Reclaimed solvents can contain low-level foreign contaminants not typically present in virgin material. Section 4 of the standard explicitly cautions users to thoroughly evaluate the effects of these contaminants on their specific process applications before committing to large-scale use. It is the responsibility of the user to establish appropriate safety practices and determine the applicability of regulatory limitations prior to use.
🚨 Critical Hazard: 1,1,1-trichloroethane is strictly incompatible with aluminum and zinc. The solvent must never be handled, stored, pumped, or metered in aluminum equipment or with aluminum components. Mixtures with finely divided aluminum or zinc powders must be strictly avoided due to the danger of a severe chemical reaction.
❓ Frequently Asked Questions
🔍 Question: What is the official designation of this standard?
Answer: The standard is officially designated as ASTM D5394-02 (Reapproved 2012), covering the Standard Specification for Reclaimed 1,1,1-Trichloroethane.
💡 Question: Which documents supplement the specifications for Type II and Type III solvents?
Answer: Type II users should consult STP-310A (Handbook of Vapor Degreasing). Type III users are directed to STP-403A (Cold Cleaning with Halogenated Sol