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D1249-92 – Standard Test Method Technical Guide
📋 Scope and Classification
ASTM D1249–92 (Reapproved 1999) provides a standardized specification for octyl ortho-phthalate ester plasticizers intended for use in the compounding of plastics. The standard establishes clear classification criteria and mandatory chemical and physical requirements. Terminology strictly follows Terminology D 883 and D 1600 to ensure industry-wide consistency.
| 🟦 Element | 📏 Specification Details | 🎯 Section Reference |
|---|---|---|
| Type I | 2-Ethyl Hexyl Phthalate Ester | Section 4.1.1 |
| Type II | Mixed Isooctyl Phthalate Ester | Section 4.1.2 |
| Chemical Requirements | Compliance with the limits prescribed in Table 1 of the standard | Section 5.1 |
| Physical Requirements | Substantially free of suspended matter; mild odor | Section 6.1 & 6.2 |
⚠️ Note on Scope: Per Note 2 of the standard, the properties included are those required to identify the type of plasticizer. Additional requirements for particular characteristics may be added as test data and methods become available.
⚙️ Testing, Sampling, and Compliance
Rigorous quality control is mandated by Section 7. Sampling and testing of the plasticizer must be conducted strictly in accordance with Methods D 1045. For moisture content, the standard specifically requires Test Method E 203 (Karl Fischer Reagent method) to ensure high precision in water determination. If a material fails initial testing, Section 8 permits retesting to establish conformity, subject to mutual agreement between the purchaser and the seller.
| 📐 Test Parameter | ⚡ Requirement | 🔍 Designated Method |
|---|---|---|
| Sampling / Ester Content / Acidity | Per limits defined in Table 1 | ASTM D 1045 |
| Moisture Content | Per limits defined in Table 1 | ASTM E 203 (Karl Fischer) |
| Color / Specific Gravity | Per limits defined in Table 1 | ASTM D 1045 |
💡 Technical Tip: Since moisture can significantly impact plasticizer performance in the final polymer compound, strict adherence to Test Method E 203 for Karl Fischer titration, as referenced in Section 7, is considered critical for accurate characterization and quality assurance.
📦 Packaging and Marking
Section 9 of the standard outlines comprehensive packaging and marking requirements to ensure product integrity during transport. The material must be packaged in standard commercial containers constructed for safe transportation at the lowest rate. Shipping containers must clearly display the material name, type, quantity, manufacturer, and contract details. All packing, packaging, and marking provisions of Practice D 3892 apply to this specification.
❓ Frequently Asked Questions
🔍 What types of plasticizers does ASTM D1249 cover?
The standard covers two specific types of octyl ortho-phthalate ester plasticizers: Type I (2-Ethyl Hexyl Phthalate Ester) and Type II (Mixed Isooctyl Ph