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7782-78-7

Basic Information
CAS No.: 7782-78-7
Name: Nitrosylsulfuric acid
Article Data: 27
Molecular Structure:
Molecular Structure of 7782-78-7 (Nitrosylsulfuric acid)
Formula: HNO5S
Molecular Weight: 127.078
Synonyms: Nitrosylsulfate ((NO)H(SO4)) (8CI);Nitrosyl sulfate (7CI);Sulfuric acid,monoanhydride with nitrous acid (9CI);Nitrosonium bisulfate;Nitrosoniumhydrogen sulfate;Nitrosyl bisulfate;Nitrosyl hydrogensulfate;Nitrosylsulfuric acid (NOHSO4);
EINECS: 231-964-2
Density: 2.18 g/cm3
Melting Point: -10 °C
Boiling Point: 333℃ at 101.33kPa
Solubility: decomposes in water
Appearance: Yellowish viscous liquid
Hazard Symbols: OxidizingO,ToxicT
Risk Codes: 8-14-23/24/25-35-34
Safety: 17-26-36/37/39-45-27
Transport Information: UN 3264 8/PG 2
PSA: 101.41000
LogP: 0.56800
Downstream Products
56548-64-2
51868-46-3
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Chemistry


IUPAC Name: Nitroso hydrogen sulfate
Canonical SMILES: N(=O)OS(=O)(=O)O
InChI: InChI=1S/HNO5S/c2-1-6-7(3,4)5/h(H,3,4,5)
InChIKey: VQTGUFBGYOIUFS-UHFFFAOYSA-N
Molecular Weight: 127.07664 [g/mol]
Molecular Formula: HNO5S
XLogP3-AA: -0.9
H-Bond Donor: 1
H-Bond Acceptor: 6 
EINECS: 231-964-2 
storage temp.: Refrigerator (+4 °C)
Water Solubility: decomposes
Appearance: Yellowish viscous liquid
Melting Point: -10 °C 
Index of Refraction: 1.546
Molar Refractivity: 18.43 cm3
Molar Volume: 58.1 cm3
Surface Tension: 104 dyne/cm
Density: 2.18 g/cm3
Product Categories of Nitrososulfuric acid (CAS NO.7782-78-7): Inorganics; pharmacetical; Chemical Synthesis; Inorganic Acids; Synthetic Reagents

Uses

 Nitrosylsulfuric acid (CAS NO.7782-78-7) is used for diazotisation, nitrosation, oxidation and oximation reactions. Product Data Sheet .

Production

Reactivity Profile of Nitrososulfuric acid (CAS NO.7782-78-7): Nitrosylsulfuric acid is an oxidizing agent. Neutralizes chemical bases in exothermic reactions. An attempt to diazotize dinitroaniline using Nitrosylsulfuric acid resulted in an explosion with loss of life. The event was blamed on the high concentration of the reactants dinitroaniline hydrochloride and Nitrosylsulfuric acid .

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

A poison. A corrosive irritant to skin, eyes, and mucous membranes. Explosive reaction above 50°C with 2-chloro-4,6-dinitroaniline and 4-chloro-2,6-dinitroaniline. Potentially explosive reaction with dinitroaniline. When heated to decomposition it emits toxic fumes of SOx and NOx.
Safety Information  of Nitrososulfuric acid (CAS NO.7782-78-7):
Hazard Codes: OxidizingO,ToxicT
Risk Statements: 8-14-23/24/25-35-34
8: Contact with combustible material may cause fire 
14: Reacts violently with water 
23/24/25: Toxic by inhalation, in contact with skin and if swallowed 
35: Causes severe burns 
34: Causes burns  
Safety Statements: 17-26-36/37/39-45-27
17: Keep away from combustible material 
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37/39:  Wear suitable protective clothing, gloves and eye/face protection 
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) 
27: Take off immediately all contaminated clothing 
RIDADR: UN 3264 8/PG 2
WGK Germany: 3
HazardClass: 8
PackingGroup: II

Specification

 Nitrososulfuric acid (CAS NO.7782-78-7), its Synonyms are Nitrosylsulphuric acid ; Sulfuric acid, anhydride with nitrous acid (1:1) ; Sulfuric acid, monoanhydride with nitrous acid .