p-Hydroxybenzoic Acid
Basic Information
Product number: SX1001
Chemical name: 4-Hydroxybenzoic acid
Molecular formula:C7H6O3
Molecular weight:138.12
CAS No. :99-96-7
EINECS No. :202-804-9
Physical and chemical properties
Molecular weight: 138．13
Density: 1．443g/cm3
Melting point: 213-214℃
Boiling point:336.2°C at 760 mmHg
Flash point:171.3°C
Appearance: white powdery crystal, no odor and taste.
Solubility: Easily soluble in hot water, alcohol, ether, and acetone, slightly soluble in cold water and benzene, insoluble in carbon disulfide.
Detailed Description
Quality standard: Q/SH 005-2014
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Item
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Index
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Polymerization level
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Industrial grade
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Appearance
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White crystalline powder
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White crystalline powder
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Content (dry basis) %≥
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99.6
|
99.0
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Melting point ℃
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214-217
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212-216
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Odor
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No odor
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No odor
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Solubility
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Clear and transparent
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Clear and transparent
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Drying loss %≤
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0.20
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0.50
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Color (Pt-Co)≤
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10
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40
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Ash content % ≤
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0.02
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0.15
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Sulfate (SO42-) % ≤
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0.01
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0.05
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Chloride (Cl-) % ≤
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0.005
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0.02
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Phenol % ≤
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0.01
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0.10
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Salicylic acid % ≤
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0.02
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0.10
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4-hydroxyisophthalic acid ppm ≤
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500
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/
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Methanol-insoluble matters ppm ≤
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50
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/
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Potasium (K+) ppm
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5
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/
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Sodium (Na+) ppm ≤
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5
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/
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Iron (Fe) ppm ≤
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5
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/
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Calcium+Magnesium (Ca2++Mg2+)ppm ≤
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10
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/
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Application
The product can be used as preservative, dye, pharmaceutical and injection intermediate. It is main raw material of liquid crystal polymer and raw material of pesticide intermediate.
Packing
Double-layer plastic woven bag, net weight is 25kg, or PP bag, net weight is 500kg/bag or 1000kg/bag.
*Special requirements can be negotiated.
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