Aqua regia

Toxic Gases & Vapors -> Acids, Inorganic

Corrosives

Aqua regia appears as 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.

Yellow fuming liquid with a suffocating odor; [Merck Index] Red, yellow, or gold fuming liquid; [University of Oxford MSDS]

This chemical does not meet GHS hazard criteria for 100% (3 of 3) of all reports.

Not Classified

Aggregated GHS information provided per 3 reports by companies from 1 notifications to the ECHA C&L Inventory.

Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]:

· Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

· Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]:

· TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death.

· TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death.

Contains nitrosyl chloride and free chlorine; Corrosive; [Merck Index] A strong oxidizing agent with known catalytic activity; Reacts with air; Causes burns; [CAMEO] Causes burns and severe respiratory tract irritation; Highly toxic by ingestion and inhalation; [University of Oxford MSDS] See Nitric acid and Hydrogen chloride.

1798 157

1798 157

AQUA REGIA 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).

Nitrohydrochloric acid

UN1798

Class 8 Corrosive material (49 eCFR § 173.136)

PG I: the degree of danger presented by the material is great

Not Classified

Corrosives

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]:

General First Aid:

General First Aid:

· Wear positive pressure self-contained breathing apparatus (SCBA).

· Wear positive pressure self-contained breathing apparatus (SCBA).

Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]:

Immediate precautionary measure

Immediate precautionary measure

1.8 [ppm]

22 [ppm]

100 [ppm]

· Note: Some foams will react with the material and release corrosive/toxic gases.

· Note: Some foams will react with the material and release corrosive/toxic gases.