Tetramethylpiperidinylamine (TAD/TMPDA): A Complete Guide to Properties, Uses, and Selection

I. Product Overview

Tetramethylpiperidinylamine, commonly known in the industry as TAD (Triacetonediamine), is a vital hindered amine fine chemical intermediate. Its CAS No. is 36768-62-4, and the molecular formula is C9H20N2.

As an amine compound featuring a piperidine ring skeleton, its unique steric hindrance and chemical reactivity make it an indispensable component in the synthesis of high-performance Hindered Amine Light Stabilizers (HALS). It is widely used across industries such as polymers, coatings, pharmaceuticals, and agrochemicals.

II. Physical & Chemical Properties

Understanding the core properties is fundamental for correct application. Below are the key physicochemical specifications for Tetram

ethylpiperidinylamine.

Property Specification

Chemical Formula C9H20N2

Molecular Weight 156.27

Appearance Colorless to pale yellow transparent liquid

Density (25°C) Approx. 0.912 g/mL

Melting Point 16-18 °C

Boiling Point 188-189 °C

Flash Point 162 °F (Approx. 72 °C) - Flammable Liquid

Solubility Soluble in various organic solvents

Safety Information: Tetramethylpiperidinylamine is a chemical synthesis intermediate. It can be irritating to the eyes, skin, and respiratory tract. Direct contact should be avoided, and appropriate personal protective equipment (PPE) must be worn. In case of contact, rinse immediately with plenty of water and seek medical attention.

III. Primary Application Areas

The core value of Tetramethylpiperidinylamine lies in its role as the key intermediate for synthesizing Hindered Amine Light Stabilizers (HALS). Its main applications are as follows:

1. Light Stabilizers for Polymers

This is the primary and most significant application. The series of high-performance HALS derived from it effectively inhibit the photo-oxidative degradation of polymers (e.g., polypropylene, polyethylene, polyurethane).

Mechanism: These light stabilizers capture free radicals generated in polymers under UV exposure and decompose them, thereby delaying material aging, embrittlement, and discoloration, significantly extending product service life.

Use Cases: Especially suitable for outdoor coatings (e.g., automotive paints, architectural coatings), plastic products (e.g., outdoor furniture, automotive parts), and UV-curable coatings, providing durable, in-situ light stabilization.

2. Polyurethane Industry

In polyurethane applications, Tetramethylpiperidinylamine can serve as both a foaming catalyst and a chain extender, helping to regulate the foaming process and improve the mechanical properties of the final product.

3. Epoxy Resin Curing Agent

It can also be utilized as a curing agent for epoxy resins, participating in the cross-linking reaction and influencing the properties of the cured material.

4. Other Fine Synthesis

Furthermore, it is used in synthesizing other high-value chemicals like quaternary ammonium block silicone oils and holds potential in the synthesis of pharmaceutical and agrochemical intermediates.

IV. Market Overview & Trends

Global demand for Tetramethylpiperidinylamine  and its downstream products continues to grow, primarily driven by:

Plastics & Coatings Industry Upgrades: Increasing demand for high-performance, weather-resistant materials.

Automotive & Construction Sector Push: As major consumers of high-end coatings and plastic products, these industries account for a significant share of relevant chemical consumption.

Regional Growth: The Asia-Pacific region, particularly China, has become one of the world's fastest-growing chemical markets, boasting substantial production capacity and consumption demand.

Market reports indicate that the related specialty chemicals market is expected to maintain steady growth, suggesting a positive future outlook for Tetramethylpiperidinylamine

V. Product Selection Guide

When choosing a Tetramethylpiperidinylamine supplier, we recommend a comprehensive evaluation based on the following aspects to ensure a stable supply of high-quality product:

1. Key Quality Indicators

Purity: Typically required to be ≥ 99.0%. High purity is fundamental for ensuring subsequent reaction efficiency and product quality.

Moisture Content: Strictly controlled at ≤ 0.5% to avoid adverse effects on moisture-sensitive reactions (e.g., catalytic reactions).

Color: High-quality product should be a colorless or faint yellow liquid, with color (APHA) typically ≤ 25.

2. Packaging, Storage & Transport

Standard Packaging: Typically supplied in 175 kg / galvanized iron drums. Flexible packaging options are available based on customer requirements.

Storage Conditions: Store in a cool, dry, well-ventilated area away from heat and moisture. Under correct storage conditions, the recommended retest period is typically one year.

Disclaimer: The chemical substances mentioned in this article are intended for industrial applications or scientific research purposes only. They are not for use in clinical diagnosis or treatment of humans or animals. All chemical operations must be conducted by professionals under appropriate safety conditions.