1. Overview
5-Sulfosalicylic Acid (CAS 5965-83-3) is a sulfonated derivative of salicylic acid widely used as a reagent in protein precipitation, urine protein tests, and analytical chemistry. Its strong chelating and protein-binding properties make it a key raw material in both laboratory analysis and certain industrial processes.
This compound is valued for its high solubility in water, excellent stability under normal conditions, and reliable performance in qualitative and quantitative testing.
2. Chemical Properties & Specifications
Appearance: White crystalline powder
Melting Point: ~300 °C (decomposition)
Solubility: Highly soluble in water and alcohol
pH: Acidic in aqueous solution
Grade Available: Analytical Reagent (AR), Laboratory Grade, Custom Purity Options
3. Key Applications
(1) Laboratory & Analytical Use
Protein Precipitation Reagent: Used in clinical laboratories for detecting protein in urine samples (urinary protein test).
Analytical Chemistry: Serves as a reagent for detecting and quantifying proteins, metals, and other analytes.
Biochemical Research: Commonly used in molecular biology protocols to purify and concentrate protein solutions.
(2) Industrial Use
Metal Chelation: Acts as a chelating agent in certain industrial formulations.
Electroplating & Metal Surface Treatment: Used in specific plating baths to improve deposit quality.
Pharmaceutical Raw Material: Intermediate in synthesis and formulation testing.
4. Market Trends
The demand for 5-Sulfosalicylic Acid is stable due to its critical role in biochemical research, diagnostic kits, and industrial applications. Growth is driven by:
Expanding clinical diagnostics sector
Increased research in protein chemistry
Development of specialized analytical reagents
Leading suppliers now focus on high-purity production and low heavy metal content to meet pharmaceutical and diagnostic-grade requirements.
5. Storage & Handling
Store in cool, dry, well-ventilated conditions
Avoid exposure to moisture and strong oxidizing agents
Use airtight containers for long-term stability
Recommended storage temperature: room temperature
6. Purchasing & Supplier Selection
When sourcing 5-Sulfosalicylic Acid (CAS 5965-83-3) in bulk, consider:
Purity level and grade (AR, lab, or custom grade)
Batch-to-batch consistency for analytical reliability
Supplier's quality management certifications (ISO, GMP)
Availability of COA, SDS, and technical data
Competitive bulk pricing and global shipping options
7. Why Choose Us as Your Supplier
We supply high-purity 5-Sulfosalicylic Acid (CAS 5965-83-3) with ≥99% purity, suitable for analytical, pharmaceutical, and industrial use. Our products are manufactured under strict ISO-certified processes, ensuring reliable quality and consistent performance.
We offer bulk supply, competitive wholesale pricing, fast delivery, and full technical documentation for global customers.