Sulfur Yellow Brown 5G

Here is the structured, professional technical profile for Sulfur Yellow Brown 5G (C.I. Sulfur Brown 10, CAS 1326-51-8, CI 53055).

Basic Identification

- Synonyms: Sulphur Yellow Brown 5G, Sulphur Red Brown DR, Sulphur Brown G; EINECS 215-429-0

- Appearance: Reddish-brown uniform powder; insoluble in water; soluble in sodium sulfide solution to dark brown; slightly soluble in concentrated sulfuric acid (faint yellow)

- Shade on cotton: Yellowish-brown with a distinct red undertone (not bright yellow)

- Preparation: Sulfurization roasting of 2,4-diaminotoluene at elevated temperature, followed by milling; higher sulfurization degree than Sulfur Light Yellow GC

Technical Specifications & Fastness

1. Typical commercial grades & quality:

- Strength: 100% (standard), common 150% grade

- Moisture: ≤5.0%

- Sodium sulfide-insoluble impurities: ≤1.5%

- 250-mesh residue: ≤5.0%

- Dyeing temp: 90–95°C reductive dyeing; faster oxidation fixation than GC (air/oxidant optional); hard water-sensitive (use sequestering agents like sodium hexametaphosphate)

2. Fastness (cotton, standard depth, ISO):

- Light: 3–4

- Washing/soaping (moderate/severe): 4/4

- Perspiration: 5

- Acid resistance: 3; Alkali resistance: 4

Applications

- Primary substrates: Cotton, linen, viscose, vinylon, blends, leather, paper

- Key shades: Yellowish-brown, reddish-brown, camel, grey; core for dark-tone color matching (avoid for bright pale yellows)

- Common uses: Denim, heavyweight cotton fabrics, industrial textiles, leather tanning

Storage & Safety

- Store cool, dry, ventilated; keep away from oxidizers, heat, direct sunlight, sparks

- PPE required (gloves, goggles, dust mask); avoid dust inhalation/skin/eye contact; follow local waste regulations for spills/disposal

High-Resolution Image Links

1. CN Color Chem Product Page

2. ChemicalBook (CAS 1326-51-8)

3. Emperor Chemical TDS

Hot Tags: sulfur yellow brown 5g, China sulfur yellow brown 5g manufacturers, suppliers, factory, sulphur dyes for nanofiber, sulphur dyes for bleached fabrics, sulphur dyes for unmercerized fibers, sulphur dyes for dyed carpets, sulphur dyes for yarn dyeing, sulphur dyes for high performance fibers