Properties
grade Reag. Ph. Eur.
  puriss. p.a.
assay 99.5-102% （calc. on dry substance）
ign. residue  ≤0.2% （as SO4）
loss ≤8% loss on drying, 105 °C
mp 224-225 °C（lit.）
  224-227 °C （from dried material）
suitability passes test for sensitivity to Fe2+

Safety
Personal Protective Equipment Eyeshields, Faceshields, Gloves, type P2 （EN 143） respirator cartridges
Hazard Codes T,N
Risk Statements 25-50/53
Safety Statements 45-60-61
RIDADR UN2811 6.1/PG 3
WGK Germany 3