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D1272-56 – Standard Test Method Technical Guide
🧪 Overview and Scope
This specification, designated ASTM D1272-56 (Reapproved 2002), covers dry pentachlorophenol for use in the preservative treatment of wood. It was originally issued in 1953 and replaced D 1272-53T. The current edition is effective from September 10, 1956. The standard is approved for use by agencies of the Department of Defense. It is identical in substance with the Standards for Pentachlorophenol in Section 1 of the American Wood-Preservers’ Association Standard for Oil-Borne Preservatives (P8-77). The standard references ASTM D1274 for chemical analysis and AWPA P8 Standards for Oil-Borne Preservatives.
📊 Composition and Properties
Dry pentachlorophenol must meet the following requirements:
| 📏 Property | 🎯 Requirement |
|---|---|
| Chlorinated phenols, min, % | 95 |
| Sodium hydroxide insoluble matter, max, % | 1 |
| Freezing point, min, °C | 174 |
These specifications ensure the efficacy of pentachlorophenol as a wood preservative. The high chlorinated phenols content and low insoluble matter guarantee that the preservative will perform effectively in treatment processes.
💡 Tip: The freezing point test is a key indicator of purity. Always verify that the material reaches at least 174°C to ensure it meets the standard.
🔬 Chemical Analysis Methods
The material shall be analyzed in accordance with Test Methods D 1274, which is published in the Annual Book of ASTM Standards, Vol 04.10. These methods provide procedures for determining the chlorinated phenols content, sodium hydroxide insoluble matter, and freezing point. Proper analysis is essential to confirm that the pentachlorophenol conforms to the specification requirements.
⚠️ Warning: Pentachlorophenol is a toxic and hazardous chemical. Handle with care and follow all safety protocols during analysis and use. Always use appropriate personal protective equipment (PPE).
❓ Frequently Asked Questions
🔍 What is the minimum chlorinated phenols content required?
The standard requires a minimum of 95% chlorinated phenols.
💡 Why is the freezing point specification set at 174°C?
A freezing point of 174°C or higher indicates high purity and suitability for wood treatment. It ensures that the pentachlorophenol is of adequate quality for preservation.
⚡ Which test methods are used for analysis?
Chemical analysis must be performed using ASTM D1274 Test Methods, which include procedures for all required properties.
📌 What other standards are referenced in this specification?
This specification references AWPA P8 Standards for Oil-Borne Preservatives, ensuring consistency with industry practices.