Description

4-Amino-4'-Nitrostilbene-2,2'-Disulfonic Acid Disodium Salt is a high-purity, water-soluble organic intermediate of significant commercial importance. This compound serves as a critical precursor in the synthesis of optical brighteners, dyes, and fluorescent materials. It is essential for manufacturers in the textile, paper, plastics, and specialty chemical industries seeking to enhance product whiteness and brightness. The product is supplied as a high-quality, consistent material to ensure reliable performance in downstream synthesis.

Application

• Optical Brightening Agent (OBA) Synthesis: A key intermediate for producing stilbene-based fluorescent whitening agents used in detergents, paper, and textiles.
• Dye Intermediate: Used in the manufacture of specific azo and direct dyes for coloring various substrates.
• Fluorescent Probe Development: Serves as a building block for creating fluorescent markers and sensors in analytical chemistry and biotechnology.
• Polymer Additives: Can be incorporated into polymers to impart specific optical or functional properties.
• Research & Development: Utilized in academic and industrial R&D for novel material synthesis and photochemical studies.
• Specialty Chemical Manufacturing: Acts as a versatile intermediate for custom synthesis and fine chemical production.

Basic Information

Product Name	4-Amino-4'-Nitrostilbene-2,2'-Disulfonic Acid Disodium Salt
CAS No.	6634-82-8
Molecular Formula	C14H10N2Na2O8S2
Molecular Weight	460.34 g/mol
Synonyms	4,4'-Diaminostilbene-2,2'-disulfonic acid, 4'-nitro-, disodium salt; Disodium 4-amino-4'-nitrostilbene-2,2'-disulfonate; ANSA; 4-Amino-4'-nitro-2,2'-stilbenedisulfonic acid disodium salt; 4,4'-Dinitro-2,2'-stilbenedisulfonic acid, diaminonated, disodium salt; Tinopal CBS-X; Fluorescent Brightener 351
EINECS	229-627-7

Quality Control

Our 4-Amino-4'-Nitrostilbene-2,2'-Disulfonic Acid Disodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use in sensitive synthesis processes. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment to guarantee traceability and batch-to-batch consistency.

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 product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed after opening to minimize exposure to atmospheric moisture and light, which can affect stability.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder or crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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