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2374-03-0

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Basic Information
CAS No.: 2374-03-0
Name: 4-Amino-3-hydroxybenzoic acid
Article Data: 12
Molecular Structure:
Molecular Structure of 2374-03-0 (4-Amino-3-hydroxybenzoic acid)
Formula: C7H7NO3
Molecular Weight: 153.137
Synonyms: (4-Carboxy-2-hydroxyphenyl)amine;3-Hydroxy-4-aminobenzoic acid;3-Hydroxy-PABA;3-Hydroxy-p-aminobenzoic acid;NSC 407243;
Density: 1.492 g/cm3
Melting Point: 211-215 °C(lit.)
Boiling Point: 385.7 °C at 760 mmHg
Flash Point: 187.1 °C
Solubility: Soluble in chloroform, and aqeous ethanol, water (Partly miscible)
Appearance: yellow-brown to brown crystalline powder
Hazard Symbols: HarmfulXn,IrritantXi
Risk Codes: 36/37/38-22
Safety: 26-37/39
PSA: 83.55000
LogP: 1.25380
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Chemistry

4-Amino-3-hydroxybenzoic acid(2374-03-0) is also named as BENZOIC ACID, 4-AMINO-3-HYDROXY-;4-AMINO-3-HYDROXYBENZOIC ACID;3-HYDROXY-4-AMINOBENZOIC ACID;3-Hydroxy PABA;benzoic acid, 4-amino-3-hydroxy-;CID137566;NSC407243,and so on.

CAS: 2374-03-0
Molecular Formula: C7H7NO3
Molecular Weight: 153.14
Molecular structure:
Melting point:  211-215 °C(lit.)
BRN:  509859
Index of Refraction: 1.691 
Molar Refractivity: 39.3 cm3 
Molar Volume: 102.6 cm3 
Polarizability: 15.57 10-24cm3 
Surface Tension: 83.3 dyne/cm 
Density: 1.491 g/cm3 
Flash Point: 187.1 °C 
Enthalpy of Vaporization: 66.93 kJ/mol 
Boiling Point: 385.7 °C at 760 mmHg 
Vapour Pressure: 1.22E-06 mmHg at 25°C 

Uses

4-Amino-3-hydroxybenzoic acid(2374-03-0) is commonly used as pharmaceutical intermediate.

Safety Profile

Hazard Codes:  Xn,Xi
Risk Statements:  36/37/38-22 (36/37/38:  Irritating to eyes, respiratory system and skin 22:  Harmful if swallowed)
Safety Statements:  26-37/39 (26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 37/39:  Wear suitable gloves and eye/face protection)
WGK Germany:  3
Hazard Note:  Irritant

Specification

Removal In Wastewater Treatment of 4-Amino-3-hydroxybenzoic acid(2374-03-0) can be stated as follows:
Total removal:1.86  percent
Total biodegradation:0.09  percent
Total sludge adsorption:1.77  percent
Total to Air:0.00  percent
(using 10000 hr Bio P,A,S)