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Terephthalic acid

Terephthalic acid
Terephthalic acid structure
Chemical Name:
Terephthalic acid
QTA;TPA;ta12;TA 12;S-LOP;Ta-33mp;TA 33LP;wr16262;nsc36973;tephthol
Molecular Formula:
Formula Weight:
MOL File:

Terephthalic acid Properties

Melting point:
300 °C
Boiling point:
214.32°C (rough estimate)
1,51 g/cm3
vapor pressure 
<0.01 mm Hg ( 20 °C)
refractive index 
1.5100 (estimate)
Flash point:
storage temp. 
15mg/l (experimental)
3.51(at 25℃)
Crystalline Powder
Water Solubility 
slightly soluble in water (0,017 g/L at 25°C)
Stable. Combustible. Incompatible with strong oxidizing agents.
CAS DataBase Reference
100-21-0(CAS DataBase Reference)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  3
RTECS  WZ0875000
Autoignition Temperature 925 °F
HS Code  2917 36 00
Toxicity LD50 orally in Rabbit: > 6400 mg/kg
Signal word:
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P321 Specific treatment (see … on this label).
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. Continuerinsing.
P332+P313 IF SKIN irritation occurs: Get medical advice/attention.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P405 Store locked up.

Terephthalic acid price More Price(11)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 185361 Terephthalic acid 98% 100-21-0 5g $24.2 2018-11-13 Buy
Sigma-Aldrich 185361 Terephthalic acid 98% 100-21-0 100g $29.1 2018-11-13 Buy
TCI Chemical T0166 Terephthalic Acid >99.0%(GC)(T) 100-21-0 25g $16 2018-11-22 Buy
TCI Chemical T0166 Terephthalic Acid >99.0%(GC)(T) 100-21-0 500g $24 2018-11-22 Buy
Alfa Aesar A12527 Terephthalic acid, 98+% 100-21-0 250g $19.8 2018-11-13 Buy

Terephthalic acid Chemical Properties,Uses,Production

Chemical Properties

white powder

Chemical Properties

TPA is a white crystalline solid.


Terephthalic acid is a benzenepolycarboxylic acid with potential anti-hemorrhagic properties.


1,4-benzenedicarboxylic acid is mainly used for the production of poly (ethylene terephthalate). Also production of plasticizer dioctyl phthalate (DOTP) and polyester plasticized agents. 1,4-benzenedicarboxylic acid and polyhydric alcohols have a condensation reaction withd iethylene glycol, triethylene glycol, glycerol, propylene glycol, butylene glycol, etc. preparation of the polyester plasticizer.


ChEBI: A benzenedicarboxylic acid carrying carboxy groups at positions 1 and 4. One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and isophthalic acids.

General Description

White powder.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Terephthalic acid is a carboxylic acid. Terephthalic acid donates hydrogen ions if a base is present to accept them. This "neutralization" generates substantial amounts of heat and produces water plus a salt. Insoluble in water but even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in Terephthalic acid to corrode or dissolve iron, steel, and aluminum parts and containers. May react with cyanide salts to generate gaseous hydrogen cyanide. Will react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by reaction with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. React with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. May initiate polymerization reactions; may catalyze (increase the rate of) chemical reactions.

Fire Hazard

Flash point data for Terephthalic acid are not available. Terephthalic acid is probably combustible.

Safety Profile

Moderately toxic by intravenous and intraperitoneal routes. Mildly toxic by ingestion. An eye irritant, Can explode during preparation. When heated to decomposition it emits acrid smoke and irritating fumes.

Potential Exposure

TPA is used primarily in the production of polyethylene terephthalate polymer for the fabrication of polyester fibers and films. A high-volume production chemical in the United States.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.

Purification Methods

Purify the acid via the sodium salt which, after crystallisation from water, is re-converted to the acid by acidification with mineral acid. Filter off the solid, wash it with H2O and dry it in a vacuum. The S-benzylisothiuronium salt has m 204o (from aqueous EtOH). [Beilstein 9 IV 3301.]


Combustible; dust may form an explosive mixture with air. Compounds of the carboxyl group react with all bases, both inorganic and organic (i.e., amines) releasing substantial heat, water and a salt that may be harmful. Incompatible with arsenic compounds (releases hydrogen cyanide gas), diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides (releasing heat, toxic and possibly flammable gases), thiosulfates and dithionites (releasing hydrogen sulfate and oxides of sulfur). Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides.

Waste Disposal

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

Terephthalic acid Preparation Products And Raw materials

Raw materials

Preparation Products

Terephthalic acid Suppliers

Global( 240)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Capot Chemical Co.,Ltd.
+86 (0)571-855 867 18
+86 (0)571-858 647 95 China 19954 60
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32651 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 1664 55
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 24118 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20229 58
Jinan Finer Chemical Co., Ltd
+86-531-88989539 CHINA 479 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 4525 58
Yancheng Green Chemicals Co.,Ltd
86-515-87883652 CHINA 351 58
career henan chemical co
+86-371-86658258 CHINA 19997 58
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 China 25106 65

View Lastest Price from Terephthalic acid manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-07-31 Terephthalic acid
US $20.00 / KG 1KG 99% 100kg career henan chemical co

Terephthalic acid Spectrum

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