o-tolyl biguanide

CAS: 93-69-6

Overview

o-Tolyl biguanide (CAS 93-69-6 ), also known commercially as Aliant, is an organic guanidine-based accelerator used in rubber vulcanization and polymer curing systems. It functions as a secondary accelerator to achieve controlled cure rates.

By activating primary accelerators, it improves crosslink density in finished compounds. In rubber manufacturing, it is used alongside thiazole or sulfenamide accelerators to produce tire components, seals, and industrial rubber goods.

These applications require consistent mechanical performance across various production batches. Latex compounding operations use it to achieve uniform vulcanization in dipped goods such as gloves and balloons.

In these specific processes, cure uniformity directly affects product rejection rates and overall efficiency. In engineering plastics and polymer systems, it supports crosslinking reactions where controlled network formation is critical.

This dimensional stability is essential for end-use durability in demanding environments. It is also applied in specialty adhesive formulations where rubber-to-substrate bonding requires a defined cure profile.

The material is supplied as a white to off-white crystalline powder for easy handling. It is available in technical grade, with purity specifications typically at 98% or higher to meet rubber industry processing requirements.

Packaging options generally range from kilogram-scale bags to bulk quantities suited to industrial compounding operations. This ensures flexibility for both small-scale specialty production and large-scale manufacturing needs.

Physical Properties

Melting Point	144 °C
Boiling Point	316.98°C (rough estimate)
Density	1.0790 (rough estimate)
Flash Point	>230 °F
Appearance	White to off-white powder. Combustible.
Color	White to Almost white
Form	powder to crystal
Water Solubility	2.75g/L at 30℃
Vapor Pressure	0Pa at 25℃
Refractive Index	1.6380 (estimate)
Log P	0.71 at 25℃

Safety & Handling

Danger GHS05 GHS07 Hazard Statements H302 Harmful if swallowed H315 Causes skin irritation H317 May cause an allergic skin reaction H318 Causes serious eye damage H319 Causes serious eye irritation H332 Harmful if inhaled H335 May cause respiratory irritation H412 Harmful to aquatic life with long lasting effects H302+H332 Harmful if swallowed or if inhaled Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code	29252900
Storage Class	11 - Combustible Solids
WGK (Germany)	1

Other Names

Industries

Plastics & Polymers Rubber & Tire