Sulphur Black BR（Sulphur Black 1）

1. Product Overview

Sulphur Black BR is the most popular sulphur dye, producing a deep jet black shade on cotton, viscose, and blends.

• CI Name & No.: Sulphur Black 1

• CAS No.: 1326-82-5

• Category: Sulphur dye

• Appearance: Black powder / granules

• Key Features: Excellent build-up, strong wash & rubbing fastness, cost-effective for bulk dyeing

• Markets: Widely used in India, Africa, Southeast Asia, Latin America

2. Technical Specifications

3. Performance & Fastness

• Wash fastness: 4–5 (ISO 105-C10)

• Light fastness: 5–6 (ISO 105-B02)

• Rubbing fastness: Dry 4 / Wet 3–4 (ISO 105-X12)

• Chlorine bleach resistance: Moderate

• Build-up: Excellent, suitable for deep black and navy shades

    Recommended Dyeing Conditions

• pH: 11–12 (Na₂S/NaOH bath)

• Temperature: 80–95 °C

• Reducing agent: Sodium sulfide

• Post-treatment: Oxidation (H₂O₂ / Na₂Cr₂O₇) + soaping

4. Applications

• Cotton fabrics — yarn dyeing, woven & knitted cotton

• Denim — essential for black denim production

• Workwear & uniforms — durable black shades with strong fastness

• Viscose & rayon — good penetration, level dyeing

• Blended textiles — cotton/polyester, cotton/linen

• Casual wear — trousers, jackets, fashion garments

  
  

5. Quality & Compliance

• COA supplied with each batch (Shade, Strength, Moisture, Insolubles, pH)

• APEO-free, meets EU restricted azo dye requirements

• Heavy metals & formaldehyde controlled within international limits

• SDS available (English; other languages on request)

6. Packaging & Logistics

• Standard: 25 kg P.W. bag / carton / iron drum

• Bulk: 500–1000 kg jumbo bags available

• MOQ: 100 kg (trial order) / 1 MT (bulk)

• Delivery: 7–10 days from warehouse

• Shelf life: 24 months (dry, ventilated storage)

• Ports: Tianjin / Qingdao / Shanghai

7. Samples & Support

• Free laboratory samples (10–50 g) available

• Courier freight to be paid by customer (DHL/UPS account)

• Technical support: shade matching & process optimization

8. Related Products

• Direct Fast Black G (Direct Black 19) – direct dye for cotton and viscose, economical black shade

• Sulphur Blue BRN (Sulphur Blue 7) – deep navy sulphur dye for cotton & denim

• Vat Blue RSN (Vat Blue 4) – reddish-blue vat dye with excellent fastness for denim & workwear