Nitrosylsulfuric acid
- Product Name
- Nitrosylsulfuric acid
- CAS No.
- 7782-78-7
- Chemical Name
- Nitrosylsulfuric acid
- Synonyms
- NITROSYL SULFATE;NITROSYLSULPHURIC ACID;nitrosylsulphuric;Nitrosylschwefelsure;NITROSYSULFURIC ACID;Nitrososulfuric acid;NITROSYLSULFURIC ACID;Nitrosyl hydrogensulfate;Nitrosylsulfuric acid 40%;Sulfuric nitrous anhydride
- CBNumber
- CB3695582
- Molecular Formula
- HNO5S
- Formula Weight
- 127.07
- MOL File
- 7782-78-7.mol
Nitrosylsulfuric acid Property
- Melting point:
- -10 °C
- Boiling point:
- 333℃ at 101.33kPa
- Density
- 1.612 g/mL at 25 °C
- vapor pressure
- 2.6-30Pa at 20-50℃
- storage temp.
- Refrigerator (+4°C)
- solubility
- reacts with H2O; soluble in H2SO4
- pka
- -7.51±0.18(Predicted)
- form
- Viscous Liquid
- color
- Clear to milky yellow to greenish
- Water Solubility
- decomposes
- Merck
- 13,6682
- InChIKey
- VQTGUFBGYOIUFS-UHFFFAOYSA-N
- CAS DataBase Reference
- 7782-78-7(CAS DataBase Reference)
- EPA Substance Registry System
- Sulfuric acid, monoanhydride with nitrous acid (7782-78-7)
Safety
- Hazard Codes
- O,T
- Risk Statements
- 8-14-23/24/25-35-34
- Safety Statements
- 17-26-36/37/39-45-27
- RIDADR
- UN 3264 8/PG 2
- WGK Germany
- 3
- HazardClass
- 8
- PackingGroup
- II
- HS Code
- 28111980
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H272May intensify fire; oxidizer
H290May be corrosive to metals
H314Causes severe skin burns and eye damage
H332Harmful if inhaled
- Precautionary statements
-
P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
N-Bromosuccinimide Price
- Product number
- 517070
- Product name
- Nitrosylsulfuric acid solution
- Purity
- 40?wt. % in sulfuric acid
- Packaging
- 250ml
- Price
- $53.1
- Updated
- 2024/03/01
Nitrosylsulfuric acid Chemical Properties,Usage,Production
Chemical Properties
Nitrosylsulfuric acid, HNO5S, is a straw-colored, oily liquid furnished as a 40% solution in 87% sulfuric acid,and stable at room temperature. It is used as a diazotizing agent for dyes,chemical intermediate, drugs and pharmaceuticals.
Physical properties
Nitrosylsulfuric acid is produced as an intermediate in the manufacture of sulfuric acid using the lead chamber process by the reaction of sulfur dioxide, nitrogen dioxide, oxygen, and water.
Nitrosylsulfuric acid also is made from absorption of nitrogen oxides (NOx) in oleum (fuming sulfuric acid):
N2O3 + 2H2SO4 → 2ONSO4 + H2O
or by the reaction of nitrosyl chloride with concentrated sulfuric acid:
ClNO + H2SO4 → ONSO4 + HCl
Another method of preparation involves the reaction of nitrosyl bromide with silver bisulfate:
AgHSO4 + BrNO → ONHSO4 + AgBr
In making disperse azo dyes, nitrosylsulfuric acid is produced by the addition of sodium nitrite, NaNO2, to concentrated sulfuric acid (1g NaNO2 per 13 g H2SO4).
Uses
Nitrosylsulfuric acid (40?wt. % in sulfuric acid) is a reagent used for the preparation of new heterocyclic disperse azo dyes.
Uses
Nitrosylsulfuric acid is used for diazotisation, nitrosation, oxidation and oximation reactions. Product Data Sheet
Uses
For bleaching cereal milling products.
General Description
Shipped in solution with sulfuric acid (solutions are usually 40% Nitrosylsulfuric acid and 54% sulfuric acid (Hawley)). Solution is a straw-colored oily liquid with a sharp odor. When pure, a crystalline solid decomposing at 73°C. Very irritating to skin and eyes. Used to make dyes and other chemicals.
Reactivity Profile
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 [MCA Case History 1763. 1971].
Hazard
Strong irritant to skin and mucous membranes.
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.
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.
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-d1nitroalne. Potentially explosive reaction with dmitroaniline. When heated to decomposition it emits toxic fumes of SOx and NOx. See also SULFATES and NITRATES.
Nitrosylsulfuric acid Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Nitrosylsulfuric acid manufacturers
- Product
- Nitrosylsulfuric acid 7782-78-7
- Price
- US $0.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 50000KG/month
- Release date
- 2023-10-25
- Product
- Nitrosylsulfuric acid 7782-78-7
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-07-11
- Product
- Nitrosylsulfuric acid 7782-78-7
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-07-09