Sodium Bisulfite 40% ACS Grade

Product Overview

Sodium Bisulfite 40% (NaHSO₃) ACS Grade is a high-purity aqueous solution functioning as a precise reducing agent and antioxidant. This formulation meets American Chemical Society (ACS) specifications, ensuring low impurity levels (heavy metals, iron, and chloride) required for critical analytical chemistry and industrial water treatment processes.

This 40% w/v solution is the standard concentration for dechlorination, oxygen scavenging in boiler systems, and reductive synthesis. As an ACS Grade material, it is specifically manufactured to support reproducible results in titration standards, photographic development, and regulatory-compliant wastewater treatment where trace contaminants must be minimized.

Key Properties

• CAS Number: 7631-90-5
• Grade: ACS Reagent Grade
• Concentration: 40% (39-41% w/w)
• Appearance: Colorless to pale yellow liquid
• Formula: NaHSO₃
• Specific Gravity: 1.23 (Typical)
• Heavy Metals (as Pb): ≤0.05–0.2 ppm
• Iron (Fe): ≤0.08–0.3 ppm
• Solubility: Completely soluble in water

Common Applications

• Water Treatment: Used for dechlorination of drinking water and wastewater, removing residual chlorine before discharge or use.
• Analytical Chemistry: A primary reducing agent in redox titrations and laboratory analysis requiring high-purity reagents.
• Industrial Processing: Acts as an oxygen scavenger in boiler water treatment and a reducing agent in chemical synthesis.
• Photography: Preservative in developer solutions to prevent rapid oxidation of developing agents.
• Textile & Paper: utilized as an antichlore and bleaching assistant.

Safety Precautions

Sodium Bisulfite 40% is a corrosive liquid (Class 8). It releases sulfur dioxide gas if in contact with acids. Store in a cool, well-ventilated area in corrosion-resistant containers (HDPE). Avoid contact with skin and eyes. Wear appropriate Personal Protective Equipment (PPE), including acid-resistant gloves, splash goggles, and face shield. Refer to the Safety Data Sheet (SDS) for specific handling and emergency response protocols.

Benefits

ACS Purity: Minimizes interference in analytical and sensitive chemical processes.
Efficient Dechlorination: Rapidly neutralizes free chlorine in water treatment systems.
Versatile Packaging: Available in sizes ranging from 1 Quart bottles to 330 Gallon totes.
Quality Assurance: Rigorous testing ensures compliance with USP-NF and ACS monographs.

Related Products

• Sodium Bisulfite 40% (Standard Grade)
• Aluminum Sulfate 50% Liquid
• Calcium Chloride
• Aluminum Sulfate Hydrate ACS Grade