Description

C.I.Sulphur Green 31 is a synthetic organic pigment belonging to the sulfur dye class, identified by CAS No. 12237-32-0. It is valued for its stable green hue and good fastness properties, making it a reliable colorant for demanding industrial applications. This pigment is primarily sought by manufacturers in the textile, leather, and specialty coatings industries seeking consistent and durable coloration.

Application

The primary use of C.I.Sulphur Green 31 is as a colorant. Its properties make it suitable for a range of applications where color stability is required.

• Textile Dyeing: For coloring cotton, viscose, and other cellulosic fibers.
• Leather Finishing: Used in the dyeing of leather goods for apparel, upholstery, and accessories.
• Paper Coloration: Employed in the production of specialty colored papers and boards.
• Ink Manufacturing: As a pigment for certain types of printing inks requiring a specific green shade.
• Industrial Coatings: For coloring coatings and paints where its chemical class is compatible.

Basic Information

Product Name	C.I.Sulphur Green 31
CAS No.	12237-32-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Sulfur Green 31; C.I. 53571; Sulphur Green 31; C.I. Pigment Green 31; D&C Green No. 31; Leather Green 31; Vat Green 31; Thioindigo Green 31
EINECS	Contact for details

Quality Control

Our C.I.Sulphur Green 31 is produced under a stringent quality management system. Each batch undergoes rigorous testing to ensure consistency in color strength, shade, and chemical purity against established internal specifications. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Green Powder
Color Strength	Standard Depth ± 5%
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Water Soluble Matter	≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.