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Terephthalic acid Structure

Terephthalic acid

Chemical Properties

Melting point >300 °C (lit.)
Boiling point 214.32°C (rough estimate)
Density  1.58 g/cm3 at 25 °C
vapor pressure  <0.01 mm Hg ( 20 °C)
refractive index  1.5100 (estimate)
Flash point 260°C
storage temp.  Sealed in dry,Room Temperature
solubility  15mg/l (experimental)
form  Crystalline Powder
pka 3.51(at 25℃)
color  White
PH 3.36(1 mM solution);2.79(10 mM solution);2.26(100 mM solution)
Water Solubility  slightly soluble in water (0,017 g/L at 25°C)
Merck  14,9162
BRN  1909333
Exposure limits ACGIH: TWA 10 mg/m3
Dielectric constant 1.5(Ambient)
Stability Stable. Combustible. Incompatible with strong oxidizing agents.
LogP 2 at 25℃
CAS DataBase Reference 100-21-0(CAS DataBase Reference)
Indirect Additives used in Food Contact Substances TEREPHTHALIC ACID
EWG's Food Scores 1
FDA UNII 6S7NKZ40BQ
EPA Substance Registry System Terephthalic acid (100-21-0)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H315-H319-H335
Precautionary statements P264-P280a-P305+P351+P338-P321-P332+P313-P337+P313-P261-P304+P340-P405-P501a
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  3
RTECS  WZ0875000
Autoignition Temperature 925 °F
TSCA  Yes
HS Code  2917 36 00
Hazardous Substances Data 100-21-0(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: > 6400 mg/kg
NFPA 704:
1
1 0

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