UN NO.:2585
HS Code: 2904100000
Specifications and Indicators
|
Project/Indicators |
母液 |
粗品 |
Industrial grade |
Pharmaceutical grade |
Refining grade |
|
Total acidity ≥% (fold sulfonic acid) |
40-60 |
90 |
93 |
95 |
97 |
|
Free acid ≤% |
20-40 |
3-6 |
3 |
2/1 |
0.7/0.5 |
|
Water (excluding crystal water) ≤% |
/ |
4-12 |
4/2 |
3.5 |
2.3 |
|
Fe++ ≤ppm |
/ |
/ |
70/50 |
50/30 |
30/20 |
|
burning residue ≤% |
/ |
/ |
/ |
0.2 |
0.2 |
|
Melting point (°C) |
/ |
/ |
/ |
/ |
100 |
|
Color |
Yellow and Black |
White, Gray |
White |
White |
White |
Product use:
1, used in medicine, pesticides, dyes and detergents, also used in plastics and printing coatings
2, used as a chemical reagent, also For dyes, organic synthesis
3, used as medicine (such as doxycycline), pesticide An intermediate such as dicofol or a dye. Also used in detergents, plastics, coatings, etc.
4, < /FONT> p-toluenesulfonic acid is an acid catalyst commonly used in organic synthesis. By using it to neutralize sodium hydroxide to obtain sodium p-toluenesulfonate, and then reacting with phosphorus pentachloride, p-toluenesulfonyl chloride can be obtained. The latter is used in the nucleophilic substitution reaction and also as a protecting group for the alcoholic hydroxyl group.
Packaging and Storage:
Packages are two-layer film bags lined with plastic woven bags, each bag has a net weight of 25 kg.
The warehouse is ventilated and dried at low temperature; stored separately from alkali. |
