(2,5-difluorophenyl)diazanium chloride

(2,5-difluorophenyl)diazanium chloride - Names and Identifiers

Name	2,5-difluorophenylhydrazine hydrochloride
Synonyms	2,5-Difluorophenylhy 2,5-DifluorophenylhydrazineHCl 2,5-Difluorophenylhydrazine HCI (2,5-difluorophenyl)diazanium chloride 2,5-Difluorphenylhydrazinehydrochloride 2,5-difluorophenylhydrazine hydrochloride 2,5-DIFLUOROPHENYLHYDRAZINE HYDROCHLORIDE 1,4-Difluoro-2-hydrazinobenzene hydrochloride 1,1,1,3-tetrachloro-2,2,3,3-tetrafluoropropane
CAS	175135-73-6
EINECS	218-868-6
InChI	InChI=1/C6H6F2N2.ClH/c7-4-1-2-5(8)6(3-4)10-9;/h1-3,10H,9H2;1H

(2,5-difluorophenyl)diazanium chloride - Physico-chemical Properties

Molecular Formula	C6H7ClF2N2
Molar Mass	180.58
Melting Point	210°C
Boling Point	189.5°C at 760 mmHg
Flash Point	68.4°C
Vapor Presure	0.567mmHg at 25°C
Appearance	Yellow powder
BRN	8640307
Storage Condition	Sealed in dry,Room Temperature
MDL	MFCD00013385

(2,5-difluorophenyl)diazanium chloride - Risk and Safety

Hazard Symbols	Xi - Irritant
Risk Codes	R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed
Safety Description	S22 - Do not breathe dust. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S36/37 - Wear suitable protective clothing and gloves. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
UN IDs	2811
HS Code	29280000
Hazard Note	Irritant
Packing Group	III

(2,5-difluorophenyl)diazanium chloride - Reference Information

introduction

2,5-difluorophenylhydrazine hydrochloride is a key intermediate for preparing a new herbicide azolidone oxalate. azolidone oxalate (Carfentrazone-ethyl) is a triazolinone contact herbicide developed by FMC
company in the United States, it has the characteristics of low toxicity, low dosage, fast weeding, wide herbicidal spectrum, good selectivity and not easy to produce resistance. The herbicidal effect is better than that of conventional herbicides such as sulfonylurea.

preparation

2, 5-difluoroaniline is used as raw material, glacial acetic acid is used as cosolvent in 3 times the amount of concentrated hydrochloric acid, and PEG-400 with 3% raw material quality is added as phase transfer catalyst, diazotization reaction was carried out with raw material
1.05 times the molar amount of sodium nitrite (prepared into aqueous solution) -5~0 ℃ for 1 h; 2, 5-difluorophenylhydrazine hydrochloride was prepared by acidification reaction with concentrated hydrochloric acid at 85 ℃ for 2 h with sodium bisulfite as reducing agent; finally, 2, 5-difluorophenylhydrazine hydrochloride can be obtained by alkaline hydrolysis of 2, 5-difluorophenylhydrazine with content ≥ 96%( HPLC) and yield
≥ 74% (calculated as 2, 5-difluorophenylhydrazine).

Last Update：2024-04-10 22:29:15