| Customization: | Available |
|---|---|
| Powder: | Yes |
| Customized: | Non-Customized |
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This azoic coloring can be reduced in paraphenylenediamine (PPD). It ean be found in some semipermanent hair dyes, and patch tests are frequently positive (about 30%) in hairdressers with hand dermatitis. Because of cross-sensitivity, the detection of sensitization to p-aminoazobenzene may be assumed by a PPD test.
4-Aminoazobenzene forms yellow to tan crystals or orange needles.
|
ITEM
|
STANDARD
|
|
Appearance
|
White powder
|
|
Assay (%)
|
≥99.5%
|
|
Acid value
|
196~211
|
|
Iodine value
|
≤1.0
|
|
Free acid (%)
|
0.28~1.2
|
|
Loss on drying (%)
|
≤5.0
|
|
Decomposition point (ºC)
|
≥200
|
|
Fineness (200 mesh,%)
|
≥99.5
|
| General Description | Odorless brownish-yellow needles with bluish coating, or an orange powder. |
as a dye for lacquer, varnish, wax products, oi! stains and styrene res ins; in insecticides; used as an intermediate in the manufacture of Acid Yellow, diazo dyes and indulines.
Qingdao Sigma Chemical Co.,Ltd is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.
The aim of Qingdao Sigma Chemical Co.,Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
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