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8.00740 EMD Millipore

Terephthaloyl dichloride

Terephthaloyl dichloride for synthesis. CAS 100-20-9, EC Number 202-829-5, chemical formula C₆H₄-1,4-(COCl)₂., for synthesis

Synonym: Terephthalic acid dichloride

  • CAS Number 100-20-9

  • Linear Formula C₈H₄Cl₂O₂

  • Molecular Weight 203.02 g/mol

  •  EC Number 202-829-5



Related Categories Biochemicals and Reagents More...
packaging   250 g in Glass bottle (8007400250)
bp   265 °C (1013 hPa)
expl. lim.     1.5 - 8.9 %(V)
vapor pressure   3.93 Pa (25 °C)
flash point   180 °C
autoignition temp.   >450 °C
mp   81.5 - 83.0 °C
pH   <0.5 (H₂O)
LD 50 oral   LD50 Rat 2500 mg/kg
LD 50 dermal   LD50 Rabbit 3160 mg/kg
storage temp.   Store below +30°C.
specifications   Assay (morpholine method): ≥ 98.0 %
  Melting range (lower value): ≥ 79 °C
  Melting range (upper value): ≤ 82 °C
  Identity (IR): passes test

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Safety Information

HS Code 
2917 39 95
Hazard Statement(s) 
H315: Causes skin irritation.
H317: May cause an allergic skin reaction.
H319: Causes serious eye irritation.
H331: Toxic if inhaled.
H335: May cause respiratory irritation.
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.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Storage class 
6.1A Combustible substances, toxic
WGK 1 slightly water endangering
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.
Hazard Pictogram(s) 
GHS06  GHS06
Hazard Symbols 
Toxic  Toxic
Declaration (railroad and road) ADR, RID 
UN 2923 , 8 (6.1), II
Declaration (transport by air) IATA-DGR 
UN 2923 , 8 (6.1), II
Declaration (transport by sea) IMDG-Code 
UN 2923 , 8 (6.1), II, Segregation Group: 1 (Acids)
Categories of danger 
toxic, irritant, sensitizing
R Phrase 
R 23-36/37/38-43
Toxic by inhalation.Irritating to eyes, respiratory system and skin.May cause sensitisation 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).
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