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LC5186 Terephthaloyl dichloride

for synthesis


Order number Packaging Quantity Price €
AC32186 Glass bottle 5 g 10.89
AC32186 Glass bottle 250 g 24.30


Product information
Synonyms Terephthalic acid dichloride
Hill Formula C8H4Cl2O2
Chemical formula C6H4-1,4-(COCl)2
HS Code 2917 39 95
EC number 202-829-5
Molar mass 203.02 g/mol
CAS number 100-20-9


Chemical and physical data
Ignition temperature >450 °C
Solubility (20 °C) (decomposition)
Melting point 81.5 – 83.0 °C
Molar mass 203.02 g/mol
Density 1.34 g/cm3 (100 °C)
pH value < - 0.5 (H2O)
Boiling point 265 °C (1013 hPa)
Vapor pressure 3.93 Pa (25 °C)
Explosion limit 1.5 – 8.9 %(V)
Flash point 180 °C


Safety information
Hazard Statement(s) H331: Toxic if inhaled.
H315: Causes skin irritation.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
H317: May cause an allergic skin reaction.
Precautionary Statement(s) P280: Wear protective gloves.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Signal Word Danger
Hazard Pictogram(s)
Storageclass 6.1A Combustible substances, toxic
WGK WGK 1 slightly water endangering
Disposal 11
Organic acid halides, anhydrides and isocyanates can be added dropwise to an excess of methanol (Cat. No. 822283) to convert them into the corresponding methyl esters or methyl carbamates. If necessary, neutralize with sodium hydroxide solution (Cat. No. 105587). Fill into container A.


Safety information
R Phrase R 23-36/37/38-43
Toxic by inhalation.Irritating to eyes, respiratory system and skin.May cause sensitization by skin contact.
S Phrase S 26-36/37-45
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable protective clothing and gloves.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Categories of danger toxic, irritant, sensitizing
Hazard Symbol Toxic


Transport information
Declaration (transport by sea) IMDG-Code UN 2923 CORROSIVE SOLID, TOXIC, N.O.S.(TEREPHTHALOYL DICHLORIDE), 8 (6.1), II, Segregation Group: 1 (Acids)
Declaration (transport by air) IATA-DGR UN 2923 CORROSIVE SOLID, TOXIC, N.O.S.(TEREPHTHALOYL DICHLORIDE), 8 (6.1), II


Toxicological data
LD 50 oral LD50 rat 2500 mg/kg
LD 50 dermal LD50 rabbit 3160 mg/kg


Assay ((morpholine method) ≥ 98 %
Melting range
– lower value
≥ 79 °C
– upper value ≤ 82 °C
Identity (IR) passes test


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