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Organic Acids REACH

Tetrachlorophthalic anhydride

CAS Number
117-08-8
EC Number
204-171-4
Chemical Formula
C8Cl4O3
Molecular Weight
285.9 g/mol
Industries:Building & ConstructionPrinting & PackagingTextile, Leather & PaperPlastics & Polymers

Description

Tetrachlorophthalic anhydride (CAS 117-08-8 ), commonly abbreviated as TCPA, is a chlorinated cyclic anhydride used as a reactive flame retardant and chemical intermediate across polymer and coating systems. Unlike additive flame retardants, it bonds directly into polymer backbones, delivering durable fire resistance without migration losses. In epoxy resin formulations for printed circuit boards, TCPA acts as a curing agent. It simultaneously imparts halogenated flame retardancy to the cured matrix. Polyester and alkyd resin producers incorporate it as a monomer to build fire-retardant properties into coatings used in construction panels. Industrial textiles and paper treatment processes use TCPA-derived intermediates to meet flame resistance standards required in packaging and protective fabrics. It also functions as a plasticizer precursor in PVC compounding. Its chlorine content contributes to both flexibility and reduced flammability in finished profiles and films. Tetrachlorophthalic anhydride is supplied as an off-white to pale yellow crystalline powder for industrial use. Technical grade is the standard commercial specification, with purity levels typically at 98% or higher. Bulk quantities are available in fiber drums or multi-wall bags suited for industrial procurement volumes. Contact us for supply of Tetrachlorophthalic anhydride Request Quote

Other Names (Synonyms)

Tetrathal | etrachlorophthalic acid anhydride | 4,5,6,7-Tetrachloro-1,3-isobenzofurandione | 1,3-Dioxy-4,5,6,7-tetrachloroisobenzofuran | Niagathal | 1,3-Isobenzofurandione, 4,5,6,7-tetrachloro- | 4,5,6,7-Tetrachloro-2-benzofuran-1,3-dione | Phthalic anhydride, tetrachloro- | TCPA

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point255-256.5 °C
Boiling Point371 °C
Density1.49
Flash Point362°C
Appearancewhite needle-like crystals or powder
ColorWhite to off-white
FormFlakes
Water Solubility0.8 mg/L (21 ºC)
Vapor Pressure0.16 mm Hg ( 145 °C)
Log P3.2 at 25℃

Safety & Handling

Danger
GHS05· CorrosiveGHS08· Health HazardGHS09· EnvironmentGHS07· Irritant

Hazard Statements

H317May cause an allergic skin reaction
H318Causes serious eye damage
H320Causes eye irritation
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H372Causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P233Keep container tightly closed.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P272Contaminated work clothing should not be allowed out of the workplace.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P284In case of inadequate ventilation wear respiratory protection.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P391Collect spillage.
P403Store in a well-ventilated place.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P316Get emergency medical help immediately.
P364Take off contaminated clothing and wash it before reuse.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29173990
UN Number3077
ADR Class9
Packing GroupIII
Storage Class6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects
WGK (Germany)2