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Methyl Paraben
■ Chemical Description
-- Methyl p-Hydroxybenzoate, Methyl Paraben
■ CAS No. 99-76-3
■ Molecular and Structural Formula C8H8O3
■ Characteristics
--White crystalline;
--Easily dissolved in alcohol, ether, acetone, and slightly dissolved in water;
■ Specification
No |
Tests |
Specification |
||
|
Q/SH008-2000 |
B.P2000 |
USP29-NF24 |
||
|
1 |
Characters |
/ |
Colorless crystals or white crystalline powder |
/ |
|
2 |
Purity (on dry base) % |
99.0 |
99.0-100.5 |
99.0-100.5 |
|
3 |
Melting Point °C |
125-128 |
125-128 |
125-128 |
|
4 |
Acidity |
qualified |
qualified |
qualified |
|
5 |
Sulfate(SO42-) % ≤ |
0.024 |
/ |
/ |
|
6 |
Loss on Drying % ≤ |
0.50 |
0.50 |
0.5 |
|
7 |
Residue % ≤ |
0.10 |
0.10 |
0.1 |
|
8 |
p-Hydroxybenzoic Acid and Salicylic Acid % ≤ |
0.10 |
/ |
/ |
|
9 |
Related Substances |
/ |
qualified |
/ |
|
10 |
Appearance of Solution |
/ |
Clear |
/ |
|
11 |
Organic Volatile impurities |
/ |
/ |
qualified |
|
12 |
Identification |
/ |
/ |
qualified |
■ Application
--Used as antiseptics in foodstuff, medicine, cosmetics and feed;
■ Packaging and Storage
--Packed in 25, 50 kg fiber or plastic drum, inner lined with PE bags;
--Stored in dry place at room temperature;
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