How toxic are the fumes from muriatic acid or hydrochloric acid?

my apt complex used the chemical and i wanted to know if i should stay somewhere else with my dog b/c of the fumes. thanks

Answer:
Muriatic acid andf hydrochloric acid is the same.

You should look up The Material safety data sheet for the chemical, some information is included below

Hazards Identification
Emergency Overview
--------------------------
POISON! DANGER! CORROSIVE. LIQUID AND MIST CAUSE SEVERE BURNS TO ALL BODY TISSUE. MAY BE FATAL IF SWALLOWED OR INHALED. INHALATION MAY CAUSE LUNG DAMAGE.

SAF-T-DATA(tm) Ratings (Provided here for your convenience)
------------------------------...
Health Rating: 3 - Severe (Poison)
Flammability Rating: 0 - None
Reactivity Rating: 2 - Moderate
Contact Rating: 4 - Extreme (Corrosive)
Lab Protective Equip: GOGGLES & SHIELD; LAB COAT & APRON; VENT HOOD; PROPER GLOVES
Storage Color Code: White (Corrosive)
------------------------------...

Potential Health Effects
------------------------------...

Inhalation:
Corrosive! Inhalation of vapors can cause coughing, choking, inflammation of the nose, throat, and upper respiratory tract, and in severe cases, pulmonary edema, circulatory failure, and death.
Ingestion:
Corrosive! Swallowing hydrochloric acid can cause immediate pain and burns of the mouth, throat, esophagus and gastrointestinal tract. May cause nausea, vomiting, and diarrhea. Swallowing may be fatal.
Skin Contact:
Corrosive! Can cause redness, pain, and severe skin burns. Concentrated solutions cause deep ulcers and discolor skin.
Eye Contact:
Corrosive! Vapors are irritating and may cause damage to the eyes. Contact may cause severe burns and permanent eye damage.
Chronic Exposure:
Long-term exposure to concentrated vapors may cause erosion of teeth. Long term exposures seldom occur due to the corrosive properties of the acid.
Aggravation of Pre-existing Conditions:
Persons with pre-existing skin disorders or eye disease may be more susceptible to the effects of this substance.

First Aid Measures
Inhalation:
Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention immediately.
Ingestion:
DO NOT INDUCE VOMITING! Give large quantities of water or milk if available. Never give anything by mouth to an unconscious person. Get medical attention immediately.
Skin Contact:
In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.
Eye Contact:
Immediately flush eyes with plenty of water for at least 15 minutes, lifting lower and upper eyelids occasionally. Get medical attention immediately.
Definitely stay away. If you can smell it then there're too much fumes. If it's in an enclosed place (which they would have had to be pretty stupid to use it in) open some windows and doors and turn on a fan. If it's outside it should go away by itself within a day or two. HCl can burn your lungs, your eyes, and your skin.
If you notice even the slightest discomfort in your lungs I would stay away...I use both in cleaning my pool from time to time...you don't want to get a whiff of them.
Harmless unless you breath them, but in all seriousness they can burn your lungs and skin if the fumes are strong enough..
if there just cleaning the masonary work on the outside of your building it should be alright but keep the windows closed..
First question that would come to mind is "How well ventilated is the building you live in". Have proper precautions been put into place to insure the safety of the residents. But if you feel better going somewhere else to live for the time being then do it.

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