Description

Acid Blue 129:1 is a synthetic, metallized acid dye belonging to the 1:1 pre-metallized dye class. This product is valued for its excellent lightfastness and washfastness properties, making it a durable colorant for demanding applications. It is primarily used by manufacturers in the textile and leather industries seeking to impart high-quality, stable blue shades to protein-based fibers such as wool, silk, and nylon.

Application

• Dyeing of wool fibers and wool-blend fabrics.
• Coloration of silk textiles for apparel and luxury goods.
• Dyeing of polyamide (nylon) fibers for carpets, apparel, and technical textiles.
• Leather dyeing for upholstery, footwear, and fashion accessories.
• Ink formulation for specialized printing applications.
• As a colorant for paper and other specialty substrates.

Basic Information

Product Name	Acid Blue 129:1
CAS No.	82944-37-4
Molecular Formula	C32H14CrN4Na2O10S2
Molecular Weight	776.59 g/mol
Synonyms	Acid Blue 129 Chromium Complex; C.I. Acid Blue 129:1; Acid Blue 129 (1:1); Acid Blue 129, chromium complex; Acid Leather Blue RL; Acidol Blue M-RL; Airedale Blue RL; Amichrome Blue RL; Atul Acid Blue RL; Chromolan Blue RL; Derma Blue RL; Elbenyl Blue RL; Irgalan Blue RL; Lanasyn Blue RL; Neolan Blue RL; Sandolan Milling Blue N-RL; Supralan Blue RL
EINECS	Contact for details

Quality Control

Our Acid Blue 129:1 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against rigorous internal specifications for critical parameters including shade, strength, and solubility. A Certificate of Analysis (COA) documenting purity, physical properties, and performance characteristics is provided with every shipment.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Standard
Lightfastness	Good to Very Good
Washfastness	Good to Very Good

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