Description

Dithionous Acid CAS NO 15959-26-9 is a sulfur oxoacid known for its strong reducing properties. This compound is a critical intermediate and reagent in various chemical synthesis and industrial bleaching processes. It is primarily utilized by manufacturers in the textile, pulp and paper, and specialty chemical sectors where controlled reduction is required.

Application

• Textile Processing: As a powerful reducing agent in vat dyeing and stripping processes.
• Pulp and Paper Industry: For bleaching chemical pulps and brightening recycled fibers.
• Chemical Synthesis: As a key intermediate in the production of other sulfur-containing compounds.
• Water Treatment: For the reduction and removal of heavy metals and chlorine from industrial wastewater.
• Laboratory Reagent: Used in analytical chemistry for specific titrations and reduction reactions.
• Food Industry (Indirect): As a processing aid in certain bleaching applications for food-grade starches and oils.

Basic Information

Item	Detail
Product Name	Dithionous Acid
CAS No.	15959-26-9
Molecular Formula	H2S2O4
Molecular Weight	130.14 g/mol
Synonyms	Hydrosulfurous Acid; Sulfoxylic Acid; Hyposulfurous Acid; Dithionous Acid; Dithionite(2-) Acid; H2S2O4; UNII-9X16S6O9XH
EINECS	Contact for details

Quality Control

Our Dithionous Acid is produced under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after each use to prevent moisture absorption and decomposition.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 2.0%
Sulfate (as SO4)	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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