Hydroxylammonium sulfate
Hydroxylammonium sulfate
Names
Other names
Hydroxylamine sulfate
Identifiers
ChEMBL
ChemSpider
ECHA InfoCard 100.030.095
EC Number
RTECS number
UNII
UN number 2865
InChI=1S/2H4NO.H2O4S/c2*1-2;1-5(2,3)4/h2*2H,1H3;(H2,1,2,3,4)/q2*+1;/p-2
Y Key:
VGYYSIDKAKXZEE-UHFFFAOYSA-L
Y InChI=1/2H4NO.H2O4S/c2*1-2;1-5(2,3)4/h2*2H,1H3;(H2,1,2,3,4)/q2*+1;/p-2
Key: VGYYSIDKAKXZEE-NUQVWONBAN
[O-]S([O-])(=O)=O.O[NH3+].O[NH3+]
Properties
H8 N2 O6 S
Molar mass 164.14 g/mol
Appearance
white crystalline to fine product, slightly hygroscopic
Density 1.88 g/cm3
Melting point 120 °C (248 °F; 393 K) decomposes
58.7 g/100 ml (20 °C)
Structure[ 1]
Monoclinic
P21 /c
a =
± 0.002 Å ,
b =
± 0.002 Å,
c =
± 0.003 Å α = 90°, β = ± 0.03 = 90°
4
Hazards
GHS labelling
Warning
H290 , H302 , H312 , H315 , H317 , H319 , H351 , H373 , H400 , H412
P201 , P202 , P234 , P260 , P264 , P270 , P272 , P273 , P280 , P281 , P301+P312 , P302+P352 , P305+P351+P338 , P308+P313 , P312 , P314 , P321 , P322 , P330 , P332+P313 , P333+P313 , P337+P313 , P362 , P363 , P390 , P391 , P404 , P405 , P501
NFPA 704 diamond)
Safety data sheet (SDS)External MSDS
Related compounds
Hydroxylammonium nitrate Hydroxylammonium chloride
Ammonium sulfate Hydrazinium sulfate
Related compounds
Hydroxylamine
Except where otherwise noted, data are given for materials in their
standard state (at 25
°C [77
°F], 100
kPa).
Chemical compound
Hydroxylammonium sulfate is the inorganic compound with the formula [NH3 OH]2 SO4 . A colorless solid, it is the sulfate salt of hydroxylamine . It is primarily used as an easily handled form of hydroxylamine, which is a volatile liquid.[ 2]
Production
Hydroxylammonium sulfate is prepared industrially by protonation of hydroxylamine. The latter is produced by the hydrogenation of nitric oxide using a platinum catalyst:[ 2]
2 NO + 3 H2 + H2 SO4 → [ NH3 OH]2 [ SO4 ] Another route to NH2 OH is the Raschig process : aqueous ammonium nitrite is reduced by HSO− 3 SO2 °C to yield a hydroxylamido-N ,N -disulfonate anion :[ 3]
[ NH4 ]+ [ NO2 ]− + 2 SO2 + NH3 + H2 O → [ NH4 ]2 [ HON(SO3 )2 ]This ammonium hydroxylamine disulfonate anion is then hydrolyzed to give hydroxylammonium sulfate:
[ NH4 ]2 [ HON(SO3 )2 ] + 2 H2 O → [ HONH3 ]2 SO4 Structure
Hydroxylammonium sulfate exists as tetrahedral NH3 OH+ cations and sulfate anions.
Safety
Hydroxylamine, which occurs widely in nature, has low toxicity. The compound is stable below 120 °C.[ 2]
External links
Compounds containing the
sulfate group (
SO2− 4 )
