4-Aminobenzoic Acid (PABA) CAS 150-13-0 Purity >99.0% (HPLC) (T) Factory USP
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Chemical Name | 4-Aminobenzoic Acid |
Synonyms | PABA; p-Aminobenzoic Acid; Para-Aminobenzoic Acid; p-Amino Benzoic Acid; H-4-Abz-OH; para-Anthranilic Acid; Vitamin Bx; Vitamin H1 |
CAS Number | 150-13-0 |
Stock Status | In Stock, Production Capacity 40 Tons per Month |
Molecular Formula | C7H7NO2 |
Molecular Weight | 137.14 |
Melting Range | 186.0~189.0℃ |
Density | 1.374 g/mL at 25℃(lit.) |
Sensitive | Light Sensitive, Air Sensitive |
Solubility in Hot Water | Almost Transparency |
Solubility in Water | Practically Insoluble in Water, 6 g/l 25℃ |
Solubility | Soluble in Methanol, Alcohol, Ether. Slightly Sol. in Benzene |
Hazard Codes | Xn, Xi |
Risk Statements | 22-36/37/38-43 |
Safety Statements | 26-36-37/39 |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 29224995 |
Brand | Ruifu Chemical |
Item | Specifications |
Appearance | White Crystalline Powder or Colorless Crystals |
Identification | IR should comply with the Reference Standard spectrum |
Identification | UV should comply with the Reference Standard spectrum |
Purity / Analysis Method | >99.0% (HPLC) |
Purity / Analysis Method | >99.0% (Neutralization Titration) |
Melting Range | 186.0~189.0℃ |
Volatile Diazoizable Substance | ≤0.002% |
Loss on Drying | ≤0.20% |
Residue on Ignition | ≤0.10% |
Arsenic (As) | ≤2ppm |
Heavy Metals | ≤0.002% |
Ordinary Impurities | Visualization |
Total Plate Count | ≤1000cfu/g |
Yeast and Mold | ≤100cfu/g |
Salmonella | Negative |
E. Coli | Negative |
Infrared Spectrum | Conforms to Structure |
Test Standard | United States Pharmacopoeia (USP) |
Usage | Pharmaceutical Intermediates |
Package: Bottle, Aluminium foil bag, 25kg/Cardboard Drum, or according to customer's requirement.
Storage Condition: Store in sealed containers at cool and dry place; Protect from light, moisture.
Stability: Stable. Incompatible with strong oxidizing agents. Combustible. Sensitive to light and air. May discolour on exposure to light.


4-Aminobenzoic Acid (CAS 150-13-0, also known as para-Aminobenzoic Acid or PABA because the number 4 carbon in the benzene ring is also known as the para position) acts as a gastric acid secretion inhibitor. It is employed as an intermediate in the synthesis of folate (Vitamin BX), azo dyes and cross linking agents. It is also useful in biomedical sector for the preparation of local anesthetic and ointments. It is widely used in industries to make pharmaceutical products, flavors and preservatives. It is actively involved as a UV-blocking ingredient in sun tan cosmetics.
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