Cyanuric chloride

CAS Number
108-77-0
EC Number
203-614-9

What is Cyanuric chloride?

Cyanuric chloride (CAS 108-77-0), also known as sym-trichlorotriazine, is a reactive triazine intermediate used in chemical synthesis and industrial manufacturing.

Where is Cyanuric chloride used?

  • Dyes and agrochemicals: building block via three replaceable chlorine atoms
  • UV stabilizers and flame retardants: commercial-scale manufacturing
  • Textile processing: coupling agent for reactive dyes bonding to cellulose fibers in cotton dyeing
  • Coatings and polymers: synthesis of UV absorbers and light stabilizers protecting resins, films and surface coatings from photodegradation
  • Water treatment: precursor to chlorinated isocyanurates for disinfection and algae control
  • Flame retardant production: core scaffold for nitrogen-based FR additives in plastics and elastomers
  • It is packaged in moisture-controlled containers because it reacts with water during storage and transport.

Good to know: Technical grade is the standard commercial form, typically specified at 98% purity or higher for industrial synthesis. Reacts with water, so moisture-controlled handling is needed.

Commercial specifications

  • Purity typically 98% or higher
  • Moisture-controlled containers

Other Names (Synonyms)

Tricyanogen chloride|sym-Trichlorotriazine|s-Triazine trichloride|Cyanuryl chloride|Cyanuric trichloride|Cyanuric acid trichloride|Cyanuric acid chloride|2,4,6-Trichloro-sym-triazine

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What are the physical properties of Cyanuric chloride?

Melting Point 146 °C
Boiling Point 192 °C
Density 1.32 g/cm³
Flash Point 190°C
Appearance White Powder
Color White
Odor pungent odor
Form Solidified Mass or Fragments
Water Solubility reacts
Vapor Pressure 0.8 mm Hg ( 62.2 °C)
Refractive Index 1.676
Log P 1.73-2.14 at 25℃

How is Cyanuric chloride classified and handled safely? Learn More

Danger
GHS05· Corrosive GHS06· Toxic GHS07· Irritant GHS08· Health Hazard

Hazard Statements

H301 Toxic if swallowed
H302 Harmful if swallowed
H313 May be harmful in contact with skin
H314 Causes severe skin burns and eye damage

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P233 Keep container tightly closed.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

Which trade and regulatory codes apply to Cyanuric chloride?

HS Code 29336980
UN Number 2670
ADR Class 8
Packing Group II
Storage Class 6.1B - Non-combustible acute toxic Cat. 1 and 2 very toxic hazardous materials
WGK (Germany) 1
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