Hydrochloric Acid (HCl) is a strong, highly corrosive mineral acid widely used in metal cleaning, pH control, food processing, and chemical manufacturing. It is a clear, colorless liquid with a sharp pungent odor and is essential in producing inorganic and organic compounds, as well as in water treatment.

Chemical Specification:

Chemical Formula : HCl
Appearance : Colorless to slightly yellow, fuming liquid
(depending on concentration and impurities)
Odor : Pungent, irritating odor
Concentration (Commercial Grade) : 30%−36% by weight (higher concentrations are
available but less common for general water
treatment due to fuming and handling difficulties)
pH (1% solution) : <1.0 (highly acidic)
Specific Gravity : 1.15−1.19 (for 30%−36% solutions)
Solubility in Water : Completely miscible (soluble) in water at all concentrations.
Boiling Point : Varies significantly with concentration

(e.g.,108.58°C for 20.2% HCl constant boiling azeotrope)
Freezing Point : Varies significantly with concentration

(e.g.,−46.2°C for 30% HCl, −30.2°C for 36% HCl)
Storage : Store in corrosion-resistant containers

(e.g.,plastic-lined steel, fiberglass reinforced
plastic, or specialized plastics like HDPE). Keep

in a cool, well-ventilated area, away from strong
bases, oxidizing agents, and metals. Avoid direct

sunlight and extreme temperatures.
Shelf Life : Indefinite if stored properly in sealed

containers.

Application:

Helps to adjust the pH for alkaline wastewater.
Helps to regenerate cation exchange resin.
To remove mineral scale deposition from equipment like pipes,heat exchangers, and RO membranes.

Hydrochloric Acid (HCl)

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