1-PHENYLPYRAZOLE

CAS NO.：1126-00-7
Empirical Formula: C9H8N2
Molecular Weight: 144.17
MDL number: MFCD00003112
EINECS: 214-415-1
SAFETY DATA SHEET (SDS)
Update Date: 2026-04-24 14:58:17

What is 1-PHENYLPYRAZOLE?

Chemical properties

clear yellow to brown liquid

The Uses of 1-PHENYLPYRAZOLE

1-Phenylpyrazole has been used:

in the preparation of 4,5-diphenylpyrazolo[1,5-a]quinoline, 1-(1,2,3,4-tetraphenylnaphthalen-5-yl)pyrazole and 1-(1,2,3,4,5,6,7,8-octaphenylanthracen-9-yl)pyrazole
as cyclometallated ligand in the preparation of new heteroleptic iridium(III) complexes

Definition

ChEBI: A member of the class of pyrazoles that is 1H-pyrazole substituted by a phenyl group at position 1.

General Description

1-Phenylpyrazole undergoes cyclometallation with rhodium trichloride to yield rac-di(μ-chloro)tetrakis[2-(pyrazol-1-yl)phenyl-C¹,N²′]dirhodium. The activation of the C-H bond of 1-phenylpyrazole autocatalyzed by the co-product HOAc was studied.

Properties of 1-PHENYLPYRAZOLE

Melting point:	11°C(lit.)
Boiling point:	141-142 °C/30 mmHg (lit.)
Density	1.091 g/mL at 25 °C (lit.)
refractive index	1.594-1.598
Flash point:	109°C
storage temp.	Sealed in dry,Room Temperature
form	clear liquid
pka	0.16±0.10(Predicted)
color	Colorless to Yellow
Water Solubility	Soluble in water.
λmax	255nm(EtOH)(lit.)
BRN	2594
CAS DataBase Reference	1126-00-7(CAS DataBase Reference)
NIST Chemistry Reference	1H-Pyrazole, 1-phenyl-(1126-00-7)

Safety information for 1-PHENYLPYRAZOLE

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.