5-HYDROXYIMINOBARBITURIC ACID

Name	5-hydroxyiminobarbituric acid
Synonyms	VIOLURIC ACID Violuric acid alloxan,5-oxime ALLOXAN-5-OXIME violuric acid hydrate 5-ISONITROSOBARBITURIC ACID 5-Isonitrosobarbituric acid 5-HYDROXYIMINOBARBITURIC ACID 5-hydroxyiminobarbituric acid 2,4,5,6(1H,3H)-Pyrimidinetetrone,5-oxime pyrimidine-2,4,5,6(1H,3H)-tetrone 5-oxime 2,4,5,6(1H,3H)-Pyrimidinetetrone, 5-oxime 5-(Hydroxyimino)pyrimidine-2,4,6(1H,3H,5H)-trione
CAS	87-39-8
EINECS	201-741-4
InChI	InChI=1/C4H3N3O4/c8-2-1(7-11)3(9)6-4(10)5-2/h11H,(H2,5,6,8,9,10)

Molecular Formula	C4H3N3O4
Molar Mass	157.08
Density	1.8278 (rough estimate)
Melting Point	240-250°C (dec.)
Boling Point	281.7°C (rough estimate)
Flash Point	252.6°C
Water Solubility	7.04g/L at 20℃
Solubility	Aqueous Acid (Sparingly), DMSO (Sparingly), Methanol (Slightly)
Vapor Presure	0Pa at 25℃
Appearance	Solid
Color	Off-White
Merck	10000
pKa	4.7(at 25℃)
Storage Condition	under inert gas (nitrogen or Argon) at 2-8°C
Stability	Hygroscopic
Refractive Index	1.5000 (estimate)
MDL	MFCD00006032

Hazard Symbols	Xi - Irritant
Risk Codes	36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing.
WGK Germany	3
RTECS	BA4225000

LogP	-1.2 at 25℃
EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
category	toxic substances
toxicity grade	poisoning
Acute toxicity	intravenous-mouse LD50:100 mg/kg
flammability hazard characteristics	flammability; Toxic NOx smoke from combustion
storage and transportation characteristics	The warehouse is ventilated and dried at low temperature; Stored separately from food raw materials
extinguishing agent	dry powder, foam, sand, carbon dioxide, water mist