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D3436-99 – Standard Test Method Technical Guide
🧪 Product Description and Key Properties
This practice outlines the essential guidelines for the sampling and handling of aniline. Aniline is a stable organic compound that does not decompose at its boiling point, even during prolonged high-temperature exposure. The vapor given off at elevated temperatures is flammable and can be effectively extinguished with water fog or spray. Aniline is highly miscible with organic solvents such as alcohol, ether, and benzene, but remains only slightly soluble in water.
| 🟦 Property | 📏 Value / Characteristic |
|---|---|
| Odor Threshold (50% detection) | 1.1 ppm |
| Thermal Stability | Stable at boiling point; no decomposition |
| Solubility in Water | Slightly soluble |
| Solubility in Organics | Miscible with alcohol, ether, benzene |
| DOT Hazard Classification | Class 6 Poison |
| Primary Regulations | 49 CFR, 29 CFR, IATA (air shipment) |
⚠️ Hazard Identification and Regulatory Compliance
Aniline is classified as a DOT Class 6 Poison. It is highly toxic and can be rapidly absorbed through the skin, requiring strict protective measures. Personnel must comply with OSHA regulations (29 CFR 1910.1000 and 1910.1200) and all DOT instructions. All containers must bear the DOT POISON label. Adequate ventilation, immediate access to first aid instructions, and knowledge of the relevant Material Safety Data Sheet (MSDS) are mandatory for all handling operations.
🚨 Critical Safety Reminder: Aniline is highly toxic and readily absorbed through the skin. Personnel must have specific first aid instructions and equipment available for use in the event of personal contact or exposure. Do not rely solely on odor for detection.
📐 Sampling and Container Procedures
Sampling must strictly follow ASTM Practice E 300 to ensure safe and representative collection. Aniline is commonly transported in DOT specification tank cars, tank trucks, or metal drums. Empty containers retain hazardous residues and must be handled according to 49 CFR regulations. Samples shipped by air must be packaged in full compliance with IATA regulations. All personnel involved should verify the specific packaging and labeling requirements relevant to their mode of transport.
❓ Frequently Asked Questions
🔍 What is the odor threshold of aniline?
The standard notes that the odor of aniline can be positively detected by 50% of people at a concentration of 1.1 ppm in the air. Despite this detectable odor, it should not be used as the primary warning system for toxic exposure.
💡 What regulations govern the shipment of aniline?
Aniline is a DOT Class 6 Poison. Domestic shipments must comply with DOT Regulations (49 CFR Subchapter C). International and air shipments must specifically adhere to IATA regulations for packaging and labeling, and all containers must display the mandatory POISON label.
⚡ Is aniline stable at high temperatures?
Yes, aniline is a stable material under normal conditions and does not decompose at its boiling point or when exposed to high environmental temperatures for long periods. However, the vapor given off at elevated temperatures is flammable.
📌 What is the primary standard for sampling aniline?
The recommended sampling procedures for aniline are detailed in ASTM Practice E 300, which provides the standard methods for the safe handling and representative sampling of industrial chemicals.