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Home> Encyclopedia > Hot Product Listed 3   > 3-Methyl-1-phenyl-2-pyrazolin-5-one
89-25-8 structure

3-Methyl-1-phenyl-2-pyrazolin-5-one

CAS No.:89-25-8
EINECS(EC#): 201-891-0
Molecular Weight:174.1992
Molecular Formula:C10H10N2O (isomer)
Properties
Appearance
light yellow crystalline powder
Density
1.12
Melting Point
127-131℃
Boiling Point
287℃ (265 mmHg)
Refractive Index
0.00014 (25 C)
Flash Point
155.2 °C
Solubility
Soluble in hot water
Color/Form
MONOCLINIC PRISMS FROM WATER
WHITE POWDER OR CRYSTALS
Stability
Stable under normal temperatures and pressures.
HS Code
29331990
Storage temp
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light.
Spectral properties
MAX ABSORPTION (ALCOHOL): 280 NM SHOULDER (LOG E= 3.6) INDEX OF REFRACTION: 1.637; MAX ABSORPTION (ALCOHOL): 245 NM (LOG E= 1.1)
IR: 15451 (Sadtler Research Laboratories IR Grating Collection)
UV: 985 (Sadtler Research Laboratories Spectral Collection)
MASS: 136 (Aldermaston, Eight Peak Index of Mass Spectra, UK)
Safety and Handling
Hazard Codes
Xi
Risk Statements
R36/37/38
Safety Statements
S26;S36
Safety

Moderately toxic by ingestion and intraperitoneal routes. An eye irritant. When heated to decomposition it emits toxic fumes of NOx.
Safety Information of Norphenazone (CAS NO.89-25-8):
Hazard Codes: Xi
Risk Statements: 36/37/38:? Irritating to eyes, respiratory system and skin?
Safety Statements: 26-36
26:? In case of contact with eyes, rinse immediately with plenty of water and seek medical advice?
36:? Wear suitable protective clothing?
WGK Germany:?1

Toxicity
1. ???

eye-rbt 500?mg/24H MOD

??? 28ZPAK ?? Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.:?1972,144.
2. ???

orl-rat LD50:3500?mg/kg

??? LONZA# ?? Personal Communication from LONZA Ltd., CH-4002, Basel, Switzerland, to NIOSH, Cincinnati, OH 45226 08FEB79 .
3. ???

ipr-mus LD50:2012?mg/kg

??? RPTOAN ?? Russian Pharmacology and Toxicology. Translation of FATOAO. 36 (1973),27.

?

Specification

?Norphenazone, its CAS NO. is 89-25-8, the synonyms are 2,4-dihydro-5-methyl-2-phenyl-3h-pyrazol-3-one ; 5-Methyl-2-phenyl-1,2-dihydropyrazol-3-one?.

Report

NCI Carcinogenesis Bioassay (feed); No Evidence: mouse, rat NCITR* ?? National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-141 ,1978. . Reported in EPA TSCA Inventory.

MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Skin irritation, Category 2

Skin sensitization, Category 1

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 4

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Warning

Hazard statement(s)

H315 Causes skin irritation

H317 May cause an allergic skin reaction

H413 May cause long lasting harmful effects to aquatic life

Precautionary statement(s)
Prevention

P264 Wash ... thoroughly after handling.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P272 Contaminated work clothing should not be allowed out of the workplace.

P273 Avoid release to the environment.

Response

P302+P352 IF ON SKIN: Wash with plenty of water/...

P321 Specific treatment (see ... on this label).

P332+P313 If skin irritation occurs: Get medical advice/attention.

P362+P364 Take off contaminated clothing and wash it before reuse.

P333+P313 If skin irritation or rash occurs: Get medical advice/attention.

Storage

none

Disposal

P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification

none

Precursor and Product
Computational chemical data
  • Molecular Weight:174.1992g/mol
  • Molecular Formula:C10H10N2O
  • Exact Mass:174.079313
  • Monoisotopic Mass:174.079313
  • Complexity:241
  • Rotatable Bond Count:1
  • Hydrogen Bond Donor Count:0
  • Hydrogen Bond Acceptor Count:2
  • Topological Polar Surface Area:32.7
  • Heavy Atom Count:13
  • Defined Atom Stereocenter Count:0
  • Undefined Atom Stereocenter Count:0
  • Defined Bond Stereocenter Count:0
  • Undefined Bond Stereocenter Count:0
  • Isotope Atom Count:0
  • Covalently-Bonded Unit Count:1
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Recommended Suppliers
  • Tel:86-571-88938639
  • Fax:86-571-88938652
  • Tel:0086-021-13042155638
  • Fax:0086-021-209316121
  • Tel:0086-27-59207850
  • Fax:0086-27-59524646
  • Tel:86-571-87758773
  • Fax:86-571-86821328
  • Tel:86-571-85829152
  • Fax:86-571-85829153
  • Tel:86-21-33758180
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  • Tel:86-571-87396430
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  • Tel:86-371-86658258
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