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High-purity aqueous solution available in multiple concentrations (e.g., 31–37% w/w HCl) for precise process control.
Consistent batch-to-batch quality certified to ISO 9001 and compliant with ASTM D1482 specifications.
Low levels of heavy metals (e.g., ≤0.1 ppm Fe, ≤0.05 ppm As) ensuring suitability for electronics-grade cleaning and pharmaceutical synthesis.
Stabilized formulation with minimal free chlorine and low residual oxidants to prevent unwanted side reactions.
Supplied in corrosion-resistant HDPE, lined steel, or fiberglass-reinforced plastic (FRP) containers with UN-certified packaging for safe transport.
Steel pickling and acid regeneration in integrated metal finishing operations.
pH adjustment and catalyst reactivation in petrochemical refining units (e.g., alkylation, isomerization).
Regeneration of ion exchange resins in high-purity water systems for power generation and semiconductor manufacturing.
Production of inorganic compounds including ferric chloride, aluminum chloride, and calcium chloride.
Controlled hydrolysis in active pharmaceutical ingredient (API) synthesis and peptide deprotection steps.
| Chemical Type | Aqueous hydrogen chloride solution |
| Product Form | Liquid (clear, colorless to pale yellow) |
| Typical Concentration Range | 31–37% w/w HCl (10–12 M) |
| Density (at 20°C) | 1.15–1.19 g/cm³ |
| Appearance | Clear, fuming liquid with pungent odor |
| Primary Applications | Chemical synthesis, metal cleaning, pH control, ore processing |
| Key Features | High reactivity, strong acidity (pKa ≈ −7), complete dissociation in water |
| Regulatory Compliance | REACH registered; SDS compliant per GHS Rev. 10; EPA TSCA listed (CAS 7647-01-0) |
| Common Compatible Systems | Suitability |
| FRP (Fiberglass-Reinforced Plastic) Piping & Tanks | Highly Recommended – Excellent chemical resistance up to 60°C at full concentration |
| Hastelloy® C-276 / C-22 Alloys | Highly Recommended – Superior resistance to chloride-induced stress corrosion cracking |
| CPVC (Chlorinated Polyvinyl Chloride) | Recommended – Suitable for <30% HCl at ambient temperatures; limited to short-term exposure above 40°C |
| Rubber-Lined Carbon Steel Vessels | Suitable – Effective for storage and transfer when lining integrity is verified per ASTM D471 |
Q1: What is the CAS Registry Number for Hydrochloric Acid?
A: The CAS Registry Number for aqueous hydrochloric acid is 7647-01-0.
Q2: How should Hydrochloric Acid be handled to minimize vapor exposure during dosing?
A: Use closed-loop metering systems with local exhaust ventilation (LEV), operate below 25°C where possible, and maintain solution pH >1 in downstream dilution tanks to suppress HCl volatilization.
Q3: How does technical-grade Hydrochloric Acid differ from USP/EP-grade material?
A: USP/EP-grade HCl meets strict limits for arsenic (<0.0003%), heavy metals (<0.001%), and non-volatile residue (<0.001%), and is manufactured under cGMP conditions — unlike technical grade, which prioritizes cost and bulk performance over trace impurity control.
Q4: Is Hydrochloric Acid subject to REACH authorization or restriction under Annex XIV/XVII?
A: No — hydrochloric acid is not listed in REACH Annex XIV (authorization list) or Annex XVII (restriction list); however, its use must comply with CLP classification (Corrosive Cat. 1, Skin Corr. 1A, Eye Dam. 1) and local occupational exposure limit (OEL) requirements (e.g., 5 ppm TWA).
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