Appearance Yellow
Boiling point 110°C (For 30 % Solution)
Fusion point -20°C (For 30 % HCl Solution)
Specific Gravity 1.19 at 20°C
Vapour pressure 11 mmHg (Sol. at 30% HCl at 20°C )
Physical state Liquid
Solubility in water Soluble in water in all proportions
pH >1
Odour Sharp irritating Odour
Others Soluble in Ethyl Alcohol & Ethyl Ether


Permissible Exposure Limit 7 (Ceiling) Mg/m3
TLV (ACGIH) 7 (Ceiling) Mg/m3
Odour Threshold 1-5 ppm

Chemical Identity

Formula: HCL CAS No. 7647-01-0
UN No. 1789 Codes/Label – Corrosive, Class 8
Hazchem Code 2R


% of HCl 30% (Minimum) & 34% Maximum
Iron as Fe Max 1. for 33% solution
Specific Gravity/ Temperature 1.158 – 32°C for 33%
Free Chlorine MAX.100

Hydrochloric Acid Uses

  • Oil field neutralizations and pigment manufacture.
  • Manufacture of Dyes, phenols and plastics.
  • Manufacture of chemicals intermediates such as FeCl3, ZnCl2, Calcium Chloride, and Phosphoric Acid.
  • Cleaning in households and industrial establishments.
  • Used in steel industry for pickling.
  • For manufacturing fullers earth.
  • Textiles (In finishing operations at mercerizing & bleaching Stages).