| Identification | More | [Name]
PICROLONIC ACID | [CAS]
550-74-3 | [Synonyms]
4-NITRO-3-METHYL-1-(P-NITROPHENYL)PYRAZOL-5-ONE
LABOTEST-BB LT00233107
PICROLONIC ACID
2,4-dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-3h-pyrazol-3-on
2-Pyrazolin-5-one, 3-methyl-4-nitro-1-(p-nitrophenyl)-
3H-Pyrazol-3-one, 1,4-dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-
3-methyl-4-nitro-1-(p-nitrophenyl)-2-pyrazolin-5-on
3-Methyl-4-nitro-1-(p-nitrophenyl)-2-pyrazolin-5-one
5-Methyl-4-nitro-2-(4-nitrophenyl)-2,4-dihydro-3H-pyrazol-3-one
3-methyl-4-nitro-1-p-nitrophenyl-5-pyrazolone
PICROLIC ACID
Picrolonic acid, 98+%
3-methyl-4-nitro-1-(4-nitrophenyl)-2-pyrazolin-5-one
2-(4-Nitrophenyl)-4-nitro-5-methyl-2,4-dihydro-3H-pyrazole-3-one
2,4-Dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-3H-pyrazol-3-one
5-Methyl-4-nitro-2-(p-nitrophenyl)-2,4-dihydro-3H-pyrazole-3-one | [EINECS(EC#)]
208-986-6 | [Molecular Formula]
C10H8N4O5 | [MDL Number]
MFCD00003133 | [Molecular Weight]
264.19 | [MOL File]
550-74-3.mol |
| Chemical Properties | Back Directory | [Appearance]
beige to ochre-yellow powder | [Melting point ]
119 °C | [Boiling point ]
548.8±50.0 °C(Predicted) | [density ]
1.65±0.1 g/cm3(Predicted) | [storage temp. ]
Refrigerator (+4°C) | [solubility ]
0.27 % in water at room temperature, readily soluble in alcohol. | [form ]
Yellow crystalline material. Melting point 116-120°C (with decomposition). | [pka]
2.44±0.40(Predicted) | [Water Solubility ]
Slightly soluble in water. Soluble in alcohol. | [Merck ]
14,7412 | [BRN ]
623723 | [CAS DataBase Reference]
550-74-3(CAS DataBase Reference) | [EPA Substance Registry System]
Picrolonic acid (550-74-3) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,Xi | [Risk Statements ]
R68:Possible risk of irreversible effects.
R36/37/38:Irritating to eyes, respiratory system and skin .
R22:Harmful if swallowed. | [Safety Statements ]
S37/39:Wear suitable gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [RIDADR ]
3224 | [RTECS ]
UQ9510000 | [TSCA ]
Yes | [HS Code ]
29339900 |
| Hazard Information | Back Directory | [Chemical Properties]
beige to ochre-yellow powder | [Uses]
As reagent for alkaloids, tryptophan, phenylalanine, and for the detection and estimation of calcium. | [Uses]
Reagent for the isolation of amines as crystalline π-complexes.Picrolonic acid is an analytical reagent used for the estimation of calcium, magnesium, lead, strontium and thorium. It is also used for the analysis of alkaloids, tryptophan and phenylalanine. | [Uses]
With calcium(II), lead(II) and thorium(IV) the reagent gives complexes which
are practically insoluble in water. The high molecular weight crystalline complexes
can be used to advantage for the accurate determination of minute amounts of
various metals.
The reagent has also proved suitable for the spectrophotometric determination
of calcium. Calcium picrolonate is transformed by bromine water in alkaline
medium to a red, water-soluble complex. The absorption of this compound is
constant for about two days and it also follows the Beer-Lambert Law. | [Purification Methods]
Crystallise picrolic acid from water or EtOH (solubility is 0.123% at 15o and 1.203% at 100o in H2O; and 1.107% at 0o and 11.68% at 81o in EtOH). It forms Ca, Cu Hg, Mg, Na, Sr, Pb and many other metal complexes [Maquestian et al Bull Soc Chim Belg 82 233 1973, Isaki et al. Chem Ber 74 1420 1941]. [Beilstein 24 H 51, 24 I 218, 24 II 25, 22 III/IV 105.] |
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