2020 Factory Price Dyestuffs Sulphur Black Br200% for Textile Dye

2020 factory price Dyestuffs Sulphur Black BR200% for Textile Dye 

1. Description

Molecular Formula: C6H4N2O5
Molecular Weight: 184.10
CAS No.: 1326-82-5
H.S. Code: 32041911

Standard: HG/T3427-2001

Sulphur black can be classified as BR (Bluish-Reddish) and B(Bluish)by their different tones, and the tone and quality can be adjusted according to the customer's requirements.
Appearance: Flashing black flakes or granules
Product character: Sulphur black is insoluble in water or ethanol, it appears as green-black in the solution of sodium sulfide, appears bluish when put caustic soda in the solution of sulphur black, and appears greenish precipitate with hydrochloric acid
It's miniature soluble in cold sulfuric acid, turns to greenish blue precipitate after it's warmer, then turns to black-blue when keeps heating. Sulphur dyes have good dye-uptake and level dyeing.

2. physical properties

Black powder. It is insoluble in water and ethanol.Soluble in sodium sulfide solution is dark green. In hydrochloric acid, the precipitation is green and black.It is blue in sodium hydroxide solution. 

3. Specification

Item	Index
	BR 185%	BR 200%	BR 220%	BR 240%	B 200%
Strength(with the standard )	100%	100%	100%	100%	100%
Shade(with the standard )	Corresponds to standard
Moisture                 ≤%	5.0	5.0	5.0	5.0	6.0
Watter insoluble       ≤%	0.5	0.5	0.5	0.5	0.5
Na2S                      ≤%	0.15	0.15	0.15	0.15	0.16
PH	8	8	8	8	8

4. Application:

Mainly used for dyeingand winding dyeing on cotton,jute,viscose,polyyinyl alcohol fibre and polyester ,polyamide fibre,especially used for rolling dyeing.It is uniform and stable in colour,good permeability when dyeing without any frahile treatment .It is also used for dyeing on Ieather and original viscose fibre.


5. Sulphur Black Packing and Loading :

(1) Packing: 25kg/bag , or 25kg/Drum .
(2) Loading quantity :800bags/20'container , 20MT/20'container .
(3) Loading quantity :640drums/20'container , 16MT/20'container .

6. Our Services

We have exact inventory plans to guarantee stable supply.

We have many years' experience of chemical logistics and dangerous chemical managers with specially trained, which ensure the safety and right of chemicals, timely logistics.

Our laboratory takes strictly testing on every lot of goods according to customers' requirement. Meanwhile we has good relationship with the third party company SGS.

After-sales service is the important part in our service. If there are quality problems, we will actively cooperate with the customers and solve the problems early.

We expect to become good partners with our customers for long.

7. Factory overview:




8. Why us :
Factory directly supplying
District quality control
Ensure high quality
Promptly delivery time for your order
More than ten years of exporting experience
Free sample