Sodium Dichromate for Dyes Production
Sodium dichromate is an important basic chemical raw material. It is used as auxiliary in printing and dyeing industry, electroplating industry and leather industry. It has special coloring ability and is widely used in glass coloring and fabric dyeing. Used as an oxidant for aniline dyestuff...
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Sodium dichromate is an important basic chemical raw material. It is used as auxiliary in printing and dyeing industry, electroplating industry and leather industry.
It has special coloring ability and is widely used in glass coloring and fabric dyeing. Used as an oxidant for aniline dyestuff dyeing in printing and dyeing industry, a post-treatment agent for curing VAT dyestuff dyeing, and a mordant for acid mordant dyestuff dyeing. It is also used to color VAT dyes that are difficult to oxidize, and fast pigment dyestuff printing reserving agent.
In the process of printing and dyeing, trivalent chromium is produced by reduction of sodium bichromate, so as to improve dyeing fastness of mordant dyes.
Introduction:
Product name |
Sodium dichromate |
Chemical name |
Sodium dichromate dihy drate |
Chemical Formula |
Na2CrO7.2H2O |
Molecular weight |
297.99 |
CAS number |
7789-12-0 |
EINECS number |
234-190-3 |
Regulatory Information |
UN 3086 6.1/PG 1 |
Product description:
Package |
50kg woven bag with PE liner |
Applications |
Oxidant for aniline dyestuff dyeing A post-treatment agent for curing VAT dyestuff dyeing A mordant for acid mordant dyestuff dyeing Reserving agent for fast pigment dyestuff printing |
Supply capacity |
20,000MT/year |
Technical Parameter:
( premium grade )
Specification |
Value |
|
Chemical Composition |
NaCr2O7.2H2O (%) |
≥99.5 |
SO4 (%) |
≤0.2 |
|
Cl (%) |
≤0.05 |
|
Fe (%) |
≤0.01 |
|
Water Insolubles (%) |
≤0.002 |
( lite grade )
Specification |
Value |
|
Chemical Composition |
NaCr2O7.2H2O (%) |
≥98 |
SO4 (%) |
≤0.4 |
|
Cl (%) |
≤0.15 |
|
Fe (%) |
≤0.15 |
|
Water Insolubles (%) |
≤0.01 |