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D4376-15 – Standard Test Method Technical Guide
📐 Scope and Overview of ASTM D4376-15
ASTM D4376-15 (Reapproved 2020) defines the specification for vapor-degreasing grade perchloroethylene (tetrachloroethylene). This standard, developed by ASTM Committee D26 on Halogenated Organic Solvents and Fire Extinguishing Agents, covers the material requirements for perchloroethylene used specifically in vapor degreasing operations. The solvent contains stabilizers to prevent degradation during use. The values stated in SI units are regarded as the standard.
⚠️ Safety and Regulatory Note: As stated in Section 1.3, this standard does not purport to address all safety concerns. Users must establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations, including OSHA’s Hazard Communication Standard (29 CFR 1910.1200), prior to use.
📊 Key Specification Properties (Table 1)
Section 3 of the standard requires that vapor-degreasing grade perchloroethylene strictly conform to the limits prescribed in Table 1. These requirements ensure optimal performance, stability during reflux, and safety in degreasing equipment.
| 🟦 Property | 📏 Test Method | 📐 Requirement |
|---|---|---|
| Purity (Gas Chromatography) | D6806 | 99.5% min |
| Acidity (as HCl) | D2989 | 0.0005% max |
| Alkalinity (as NaOH) | D2989 | 0.0005% max |
| Nonvolatile Matter | D2109 | 0.001% max |
| Color (Pt-Co Scale) | D2108 | 15 max |
| Water Content | D3401 | 0.003% max |
| Specific Gravity (25/25 °C) | D2111 | 1.616 – 1.622 |
| Distillation Range (760 mm Hg) | D3741 | 120.5 – 122.5 °C |
| Total Acid Acceptance (Alkali) | D2942 | 0.40% min |
| Free Halogens | Visual / D3741 | None |
| Appearance | D3741 | Clear, free of suspended matter |
💡 Technical Note: Guide D3844 (Labeling Chlorinated Hydrocarbon Solvent Containers) and Practice D4276 (Confined Area Entry) are essential companion documents referenced in the standard for safe handling, storage, and operational best practices.
📦 Packaging, Marking, and Industry Compliance
Section 4 of ASTM D4376-15 mandates that industrial and commercial quantities of perchloroethylene must be packaged and labeled in strict accordance with the U.S. Department of Transportation (DOT) Hazardous Materials Regulations found in 49 CFR 100 to 199, as well as relevant state and local regulations. Additionally, compliance with the Occupational Safety and Health Administration (OSHA) Hazard Communication Standard (29 CFR 1910.1200) is required. Proper marking ensures the clear communication of hazards and safe handling instructions throughout the supply chain.
❓ Frequently Asked Questions
🔍 What is the minimum purity required for vapor-degreasing grade perchloroethylene under ASTM D4376?
ASTM D4376-15 requires a minimum purity of 99.5% by weight when analyzed by gas chromatography in accordance with Practice D6806. The presence of specific inhibitors distinguishes vapor-degreasing grade from other grades of perchloroethylene.
💡 Why is the “Total Acid Acceptance” specification critical for this standard?
The Total Acid Acceptance (tested per D2942) measures the capacity of the solvent’s stabilizer package to neutralize acidic breakdown products during vapor degreasing. A minimum of 0.40% is required to prevent corrosion of equipment and workpieces during thermal cycling.
⚡ What are the strict allowable limits for moisture in this specification?
The standard references Test Methods D3401 for determining water content. The maximum allowable limit is strictly controlled at 0.003% (30 ppm) to ensure solvent stability and prevent hydrolytic degradation during the degreasing process.
📌 Are there visual quality standards required per Table 1?
Yes. The standard requires a platinum-cobalt color of 15 maximum (per Test Method D2108) and a clear, free of suspended matter appearance (per Test Methods D3741) to confirm the solvent is free of contamination and degradation.