Nitrosylsulfuric acid

  • Nitrosyl sulfate
  • Nitrosyl hydrogen sulfate
  • Nitrosyl bisulfate
  • Nitrosonium hydrogen sulfate
  • Nitrosonium bisulfate
  • Sulfuric acid, monoanhydride with nitrous acid
Formula
NOHSO4
Structure
Description
White leafs.

Registry Numbers and Inventories.
CAS
7782-78-7
EC (EINECS/ELINCS)
231-964-2
EC Class
oxidizing, corrosive
R 8 14 29 35
S 26 36/37/39 45
UN (DOT)
2308
Merck
12,6746
Beilstein/Gmelin
45322 (G)
Swiss Giftliste 1
G-9045
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
HNO5S
Formula mass
127.08
Decomposition point, °C
73 - 76
Vapor pressure, mmHg
44 (20 C)
Density
1.9 g/cm3
Solubility in water
Very soluble

Hazards and Protection.
Storage
Refrigerator (approx 4C).
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Sweep up, then place into a suitable container for disposal.
Disposal code
24
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.

Fire.
Fire fighting
Note: Most foams will react with the material and release corrosive/toxic gases. Small Fires: carbon dioxide (except for Cyanides), dry chemical, dry sand, alcohol-resistant foam. Large Fires: Water spray, fog or alcohol-resistant foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
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. Reaction with water may generate much heat which will increase the concentration of fumes in the air. Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
1
Exposure effects
   Ingestion
Not available.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Causes chemical burns to the respiratory tract.
   Skin
May cause severe irritation and possible burns.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. Allow the victim to rinse his mouth and then to drink 2-4 cupfuls of water, and seek medical advice.
   Inhalation
Remove from exposure to fresh air immediately.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
2308
Response guide
Hazard class
8
Packing Group
II
 
HS Code
2811 19 80