Terephthalic acid | CAS No. 100-21-0

Q: What is Terephthalic acid (CAS: 100-21-0)?

Terephthalic acid, with the CAS number 100-21-0, is an aromatic dicarboxylic acid commonly used as a precursor in the production of polyethylene terephthalate (PET). Its chemical formula is C8H6O4, and it is a white crystalline solid with a melting point of approximately 300°C. It is soluble in organic solvents and has acidic properties, making it important in various chemical reactions and industrial processes.

Q: What are the main uses of Terephthalic acid (CAS: 100-21-0)?

Terephthalic acid (CAS: 100-21-0) is widely used in the manufacturing of polyester fibers, plastic bottles, and films. It also serves as a key component in the production of pharmaceuticals, dyes, and other specialty chemicals. Additionally, it is utilized in the synthesis of polyurethanes and as a raw material in research and development for new materials and compounds.

Q: Is Terephthalic acid (CAS: 100-21-0) safe?

Terephthalic acid (CAS: 100-21-0) is generally considered safe when handled properly. However, it can be harmful if inhaled, ingested, or comes into contact with the skin. Protective measures such as gloves, goggles, and proper ventilation are recommended. Safety standards ensure its controlled use in industrial and research settings to minimize exposure risks.

Q: How should Terephthalic acid (CAS: 100-21-0) be stored?

Terephthalic acid (CAS: 100-21-0) should be stored in a cool, dry, and well-ventilated place, away from moisture and direct sunlight. It is best kept in sealed, airtight containers made of materials like polyethylene to prevent degradation. Storage conditions should maintain a temperature below 25°C and low humidity to preserve its chemical stability and prolong shelf life.

Terephthalic acid

Basic Information

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CAS Number

100-21-0

Molecular Formula

C8H6O4

Molecular Weight

166.13 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Fine Chemicals Dyes and Pigments Organic Dyes

Basic Physical Properties

Melting Point

>300 °C

Boiling Point

214.32°C (rough estimate)

Water Solubility

slightly soluble in water (0,017 g/L at 25°C)

Flash Point

260°C

Refractive Index

1.5100 (estimate)

Vapor Pressure

<0.01 mmHg ( 20 °C)

SMILES

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OC(=O)c1ccc(cc1)C(=O)O

InChI

InChI=1S/C8H6O4/c9-7(10)5-1-2-6(4-3-5)8(11)12/h1-4H,(H,9,10)(H,11,12)

InChIKey

KKEYFWRCBNTPAC-UHFFFAOYSA-N

LogP

1.083

pKa

3.51(at 25℃)

Topological Polar Surface Area

74.6 Å²

Hydrogen Bond Donor/Acceptor

2 / 4

Complexity

169

Safety Information

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GHS Hazard Pictograms

H315

H319

H335

Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Stability

Stable. Combustible. Incompatible with strong oxidizing agents.

Synonyms & References

English

Terephthalic acid
PTA
Benzene-1,4-dicarboxylic acid
P-Phthelic Acid
p-Phthalic acid
1,4-dicarboxybenzene
1,4-phthalicacid
Acide terephtalique
acideterephtalique(french)
Benzene-p-dicarboxylic acid
Kyselina tereftalova
Kyselina terftalova
P-Phthalic acid (PTA)
Caffeic acid
P-BENZENEDICARBOXYLIC ACID
-Phthalic acid (PTA)
PURIFIED TEREPHTHALIC ACID
Tephthol
TEREPHTHALIC ACID (TPA)
TEREPHTHALIC ACID FOR SYNTHESIS
TPA
1,4-Benzenedicarboxylic acid
QTA
S-LOP
TA 33LP
TPA (terephthalic acid)
p-Benzenedicarboxylic acidx
TA 12
Ta-33mp
wr16262
nsc36973

MDL Number

MFCD00002558

Customs Code

2917361100

FAQ

What is Terephthalic acid (CAS: 100-21-0)?

Terephthalic acid, with the CAS number 100-21-0, is an aromatic dicarboxylic acid commonly used as a precursor in the production of polyethylene terephthalate (PET). Its chemical formula is C8H6O4, and it is a white crystalline solid with a melting point of approximately 300°C. It is soluble in organic solvents and has acidic properties, making it important in various chemical reactions and industrial processes.

What are the main uses of Terephthalic acid (CAS: 100-21-0)?

Terephthalic acid (CAS: 100-21-0) is widely used in the manufacturing of polyester fibers, plastic bottles, and films. It also serves as a key component in the production of pharmaceuticals, dyes, and other specialty chemicals. Additionally, it is utilized in the synthesis of polyurethanes and as a raw material in research and development for new materials and compounds.

Is Terephthalic acid (CAS: 100-21-0) safe?

Terephthalic acid (CAS: 100-21-0) is generally considered safe when handled properly. However, it can be harmful if inhaled, ingested, or comes into contact with the skin. Protective measures such as gloves, goggles, and proper ventilation are recommended. Safety standards ensure its controlled use in industrial and research settings to minimize exposure risks.

How should Terephthalic acid (CAS: 100-21-0) be stored?

Terephthalic acid (CAS: 100-21-0) should be stored in a cool, dry, and well-ventilated place, away from moisture and direct sunlight. It is best kept in sealed, airtight containers made of materials like polyethylene to prevent degradation. Storage conditions should maintain a temperature below 25°C and low humidity to preserve its chemical stability and prolong shelf life.