Hazardous Chemical Information for Hcl

Case Study 6.1-------------------------------------------------

Hazardous Chemical Information For Process Safety Analysis |

Name of the chemical | Hydrochloric Acid (HCl) also known as Aqueous Hydrogen chloride, Muriatic acid |

Toxicity Information | Inhalation of mists can cause corrosive action on mucous membranes. Severe and rapid corrosion from contact to skin and eye.Oral exposure may cause corrosion of the mucous membranes, esophagus, and stomach, with nausea, vomiting, and diarrhea reported in humans.Lethal dose (for 50% population):Rabbit (oral) : 900mg/kgRat (oral) : 700mg/kgLethal concentration for inhalation (for 50% population) :Rats : 3124 ppm/1H |

Permissible exposure Limit | OSHA PEL = 5 ppm(7 mg/m3) Ceiling |

Physical data | Clear, colorless to slight yellow liquid , acidic odorMelting Point/Freezing Point: -46°C (-51°F) Boiling Point: 51°C (123°F) Not FlammableVapor Pressure (at 20ºC): 15 mmHg Vapor Density (air =1): 1.267Density : 1.49 at 21oC |

Reactivity data | Reacts violently with strong alkaline substances, reducing agents. Incompatible with bases, amines, acids. Contact with metals may evolve flammable hydrogen gas. |

Corrosivity data | Department of Transportation data : corrosive material |

Thermal /chemical stability | Thermally and Chemically stable at normal condition. May decompose upon heating to produce corrosive and/or toxic fumes (Cl2 gas). |

Hazardous Mixing | React vigorously with water to produce heat and steam. Controlled addition of water is necessary. |

References:

1. http://toxnet.nlm.nih.gov

2. https://www.osha.gov

3. U.S. Department of Health and Human Services. Hazardous Substances Data Bank (HSDB, online database). National Toxicology Information Program, National Library of Medicine, Bethesda, MD. 1993.

4. Material Safety data sheet for Hydrochloric acid, retrieved from http://www.nanotech.wisc.edu/CNT_LABS/MSDS/Acids/MSDS%20Hydrochloric%20acid.htm