hydroquinone Photo grade (widely used in food and cosmetics)
Usage: Can be used as intermediates of polymer, monomer inhibitor, dyes and auxiliary; as antioxidant in food and medicine industry; as anti coagulant for gas; developer for film, photos and X-ray film.
Specification:
Item | Specification | Typical Test Result | |
APPEARANCE | White needle crystal or powder | White needle crystal or powder | |
PURITY | % | 99.5-101.0 | 99.8 |
MELTING POINT | °C | 171-175 | 172.0-174.0 |
WATER | % | 0.3 MAX | 0.12 |
SOLUBILITY | Transparent without insoluble matter | Transparent without insoluble matter | |
RESIDUE ON IGNITION (ASH) | % | 0.05 Max | 0.001 |
HEAVY METAL (Pb) | % | 0.002 Max | 0.0010 |
IRON (Fe) | % | 0.002 Max | 0.0009 |
Advantage of our product(Comparison table):
SUPPLIERS | ZENVA SINO | SOME OTHER HQ PRODUCER |
PRODUCTION PROCESS | ANILINE | PHENYL HYDROXIDE |
QUALITY | Not containing pyrocatechin and the purity is higher than that of product made from phenyl hydroxide;not containing dioxin | Containing pyrocatechin because of the incapable complete separation of pyrocatechin and hydroquinone; containing of dioxin |
USAGE | Can be used in cosmetic and food additives, also used in industrial area, such as rubber antioxidant | Mainly used in industrial area, such as rubber antioxidant;Can not be used in cosmetic and food |