Product Overview & Quality

Product Name: Sodium metabisulfite (Sodium pyrosulfite)
Brand: Kemaus (Product Code: KA-487-2)
Grade: Analytical Reagent (AR Grade). Manufactured and certified under Kemaus strict laboratory quality control standards to guarantee exceptionally low trace levels of heavy metals, arsenic, and foreign interfering ions. This high-purity chemical baseline provides maximum stability, clean target accuracy, and prevents unwanted chemical side reactions.
Physical Properties: Faint pungent sulfur dioxide odor, white crystalline powder or yellowish-white granular crystals.
Solubility: Highly soluble in water, yielding a mildly acidic aqueous solution; soluble in glycerin; slightly soluble in alcohol.
Key Use: Widely utilized as a powerful antioxidant and stabilization reagent to prevent oxidative degradation in chemical formulations and biological sample matrices. Commonly applied as a dependable reducing agent in organic synthesis and analytical chemistry assays. Heavily used in environmental laboratories and waste treatment research for the reduction of hexavalent chromium to trivalent chromium prior to safe precipitation, and functions as a specialized chemical agent for treating laboratory glass arrays.

Safety & Hazards (Critical)

Classification: Harmful if swallowed. Causes skin irritation. Causes serious eye damage. Contact with acids liberates toxic gas. May cause respiratory irritation.
Health Risks: Direct eye contact triggers immediate severe stinging irritation, deep pain, watering, and potential permanent ocular damage. Dermal exposure induces localized irritation and chemical discomfort. Inhalation of its airborne dust or liberated sulfur dioxide vapors aggressively irritates the upper respiratory tract, inducing violent coughing, wheezing, and potentially fatal allergic reactions or acute asthma distress in sulfite-sensitive individuals.
First Aid Measures: Flush affected eyes or skin immediately with plenty of flowing water for at least 15 minutes while removing contaminated garments. If gases are inhaled, promptly move the victim to fresh air. Seek immediate medical evaluation.

Handling & Storage

Storage: Air, Moisture, and Acid Sensitive. Extended contact with ambient humidity and air induces slow chemical degradation and discharges sulfur dioxide gas. Must be stored in its original, tightly sealed Kemaus container. Keep in a cool, strictly dry, and well-ventilated chemical safety zone at stable room temperature (below 30 degrees Celsius). Keep completely isolated and separated from acids, strong oxidizing agents, and direct heat sources (contact with acid triggers immediate release of highly toxic and pungent fumes).
Precautions: Wear standard personal protective equipment (PPE), including chemical-resistant laboratory gloves, safety glasses, and a particulate respirator. Handle exclusively within a properly functioning laboratory fume hood to avoid vapor exposure or accidental gas inhalation.