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Hydrochloric acid, mixed with nitric acid (3:1)

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Name Hydrochloric acid, mixed with nitric acid (3:1) EINECS
CAS No. 8007-56-5 Density
Solubility Melting Point
Formula Boiling Point
Molecular Weight 82.46644 Flash Point
Transport Information Appearance red, yellow or gold fuming liquid
Safety A corrosive irritant to the eyes, skin, and mucous membranes. When heated to decomposition it emits very toxic HCl, HNO3, Cl, and NOx. See also HYDROCHLORIC ACID, NITRIC ACID, and NITROSYL CHLORIDE. Risk Codes
Molecular Structure Molecular Structure of 8007-56-5 (Aqua regia) Hazard Symbols
Synonyms

Chloroazoticacid; Chloronitrous acid; Met-Etch; Nitrohydrochloric acid; Nitromuriatic acid;Wangshui

 

Chemistry

IUPAC Name: Nitric acid hydrochloride
Synonyms of Hydrochloric acid, mixed with nitric acid (3:1) (CAS NO.8007-56-5) : Nitrohydrochloric acid
CAS NO: 8007-56-5
Molecular Formula:ClHNO2
Molecular Weight :82.46644
Molecular Structure :
Density 14.7 lb /gal.
Enthalpy of Vaporization: 37.72 kJ/mol
Boiling Point: 83°C at 760 mmHg
Vapour Pressure: 49.8 mmHg at 25°C
Stability: Pressure will develop in sealed bottles. Incompatible with (and may react violently with) a wide variety of materials, including metals, oxidising agents, reducing agents, combustible materials.
Appearance: Hydrochloric acid, mixed with nitric acid (3:1) (CAS NO.8007-56-5) is red, yellow or gold fuming liquid.

Production

Preparation Products :Palladium-->Platinum-->3-Acetyl-1-propanol-->Iridium-->Rhodium

Safety Profile

A corrosive irritant to the eyes, skin, and mucous membranes. When heated to decomposition it emits very toxic HCl, HNO3, Cl, and NOx. See also HYDROCHLORIC ACID, NITRIC ACID, and NITROSYL CHLORIDE.

RIDADR 1798
HazardClass 8
PackingGroup I

Standards and Recommendations

DOT Classification:  8; Label: Corrosive

Specification

1.General Description: Hydrochloric acid, mixed with nitric acid (3:1) (CAS NO.8007-56-5) is a yellow liquid with a pungent odor prepared by mixing nitric acid and hydrochloric acid, usually in a ratio of one part of nitric acid to three or four parts of hydrochloric acid. Fumes are irritating to the eyes and mucous membranes. Corrosive to metals and to tissue.
2.Air & Water: Reactions Fumes in air. Soluble in water with release of heat.
3.Reactivity Profile: Nitrohydrochloric acid is a powerful oxidizing agent and a strong acid. Reacts exothermically with chemical bases (for example: amines and inorganic hydroxides) to form salts and water. Reacts with most metals, including gold and platinum, to dissolve them with generation of toxic and/or flammable gases. Can initiate polymerization in polymerizable organic compounds. Reacts with cyanide salts to generate toxic hydrogen cyanide gas. Generates flammable and/or toxic gases with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and weak or strong reducing agents. Additional exothermic gas-generating reactions occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and carbonates (CO2).
4.Health Hazard :TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
5.Fire Hazard: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
 

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