Chemical name: 4,4-Diaminostilbene-2,2-disulfonic acid
Chemical formula: C14H14N2O6S2
Molecular weight: 370.4
CAS NO.:81-11-8
Property: 1)Light yellow cream or powder, soluble in ethanol and ether; insoluble in water, easily soluble in alkaline solution. 2)Can be easily oxidized into red; has the property of aromatic acid or aromatic amine
Quality index:
Item Index
(1)Appearance dry/wet light yellow powder/light yellow cream
(2)Dry product total amino value(gross dry sample)% 95.0
(3)Degree of pigmentation(EOD) 0.12
(4)Content of alkali insolubles (gross cream )% 0.08
(5)Benzyl compound(gross sample)% 0.25
(6)Ash content% 2.2.
Dry product: in 25kg woven bags or upon clients' request; wet product: in 40kg woven bag or upon clients' request.
Chemical name: 4,4-Dinitrostilbene-2,2-disulfonic acid
Structural formula:
Chemical formula: C14H10N2O10S2
Molecular weight: 430
CAS NO.:128-42-7
Quality index:
Item Index
(1)Appearanceorange powder
(2)Binitro acid content(gross dry product)% 66.0
(3)binitrobenzyl compound
(gross dry product )% 0.5
(4)Other organic impurities(gross dry product )% 2.0
(5)Inorganic salt(gross dry product )% 2.0
(6)Water insolubles(gross dry product)% 1.0
Main use: it is an intermediate of dyes.
25kg plastic woven bag.
Chemical name: p-nitrotoluene-o-sulfonic acid Structural formula:
Chemical formula: C7H11NO7S
Molecular weight: 253
CAS NO.:121-03-9
Quality index:
Item Index
(1)Appearance milk white crystal
(2)Assay (Gross sample)% 80.0
(3)Moisture (Gross sample)% 5.0
(4)Free acid (Gross sample)% 1.0
(5)Insolubles(Gross sample% 0.1
Main use: it is an intermediate of dyes, can be used to manufacture Yellow R.
25kg plastic woven bag or upon clients' request.
Chemical Name: Sulfanilic acid
Structural Formula:
Chemical Formula: C6H7NO3S
Molecular Weight: 173.18648
CAS NO.: 121-57-3
Product Index:
Item Index
1. Appearance White to grey white powder
2. Purity (total amino value) 99.0%
3. Density 1.485g/cm3
4. Fusion Point 285C
5. Water-solubility 0.1 g/100 mL.
Main use: for azo dyes manufacturing, also for agricultural chemicals to prevent wheat rust.
25KG plastic woven bag.
Chemical Name: 2-Amino-1,4-benzenedisulfonic acid
Structural Formula:
Chemical Formula: C6H5NO6S2
Molecular Weight: 251.2381
CAS NO.: 98-44-2
Quality Index:
Item Index
1. Appearance Pink White Powder
2. Purity 98%
3. Water Insolubles 0.1%.
Main Use: For dyes intermediates for the manufacturing of direct resistance to question the blue RGL, reactive turquoise bluse KGL, reactive brilliant yellow and reactive orange etc.
25KG plastic woven bag.
