| ≥1 piece |
Chemical name: 4-Hydroxybenzoic acid
Molecular formula:C7H6O3
Molecular weight:138.12
CAS#:99-96-7
Physical and chemical properties: white powdery crystal, no odor and taste. Easily soluble in hot water, alcohol, ether, and acetone, slightly soluble in cold water and benzene, insoluble in carbon disulfide. Relative density is 1.46.
Quality standard: Q/SH 005-2014
|
Item |
Index |
|
|
Polymerization level |
Industrial grade |
|
|
Appearance |
White crystalline powder |
White crystalline powder |
|
Content (dry basis) %≥ |
99.6 |
99.0 |
|
Melting point ℃ |
214-217 |
212-216 |
|
Odor |
No odor |
No odor |
|
Solubility |
Clear and transparent |
Clear and transparent |
|
Drying loss %≤ |
0.20 |
0.50 |
|
Color (Pt-Co)≤ |
10 |
40 |
|
Ash content % ≤ |
0.02 |
0.15 |
|
Sulfate (SO42-) % ≤ |
0.01 |
0.05 |
|
Chloride (Cl-) % ≤ |
0.005 |
0.02 |
|
Phenol % ≤ |
0.01 |
0.10 |
|
Salicylic acid % ≤ |
0.02 |
0.10 |
|
4-hydroxyisophthalic acid ppm ≤ |
500 |
/ |
|
Methanol-insoluble matters ppm ≤ |
50 |
/ |
|
Potasium (K+) ppm |
5 |
/ |
|
Sodium (Na+) ppm ≤ |
5 |
/ |
|
Iron (Fe) ppm ≤ |
5 |
/ |
|
Calcium+Magnesium (Ca2++Mg2+)ppm ≤ |
10 |
/ |
Uses: 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