Todralazine hydrochloride Property

storage temp. 

Store at -20°C

solubility 

DMF: 5 mg/ml; DMSO: 10 mg/ml; DMSO:PBS (pH 7.2) (1:1): 0.5 mg/ml; Ethanol: 1 mg/ml; PBS (pH 7.2): slightly

form 

A crystalline solid

color 

White to off-white

Safety

Hazard Codes 

Xn

Risk Statements 

20/21/22

Safety Statements 

36

WGK Germany 

3

RTECS 

FE2778600

Toxicity

LD50 i.p. in mice: 500 mg/kg (Parravincini)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H312Harmful in contact with skin

H332Harmful if inhaled

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P322Specific measures (see …on this label).

P330Rinse mouth.

P363Wash contaminated clothing before reuse.

P501Dispose of contents/container to..…

Todralazine hydrochloride Chemical Properties,Usage,Production

Originator

Prorazin,Teisan

Uses

Todralazine Hydrochloride is an antihypertensive agent for research use. Vasodilator.

Uses

Antihypertensor

Manufacturing Process

A suspension of 13 g of hydrazinophthalazine in 500 ml of anhydrous ethanol is cooled, under agitation to a temperature of -10°C. To the suspension is added dropwise within 30 min a solution of 4.5 g of ethyl chlorocarbonate in 150 ml of anhydrous ethanol and the reaction mass is agitated for about 2 hours, maintaining a temperature of -10°C. The temperature is then raised to about 20°C and stirring is continued for 2 hours, whereupon heating is applied and boiling is maintained for 15 min. After cooling, the separated 1- hydrazinophthalazine hydrochloride is filtered and washed with anhydrous ethanol.
The filtrate is evaporated to a dry state under decreased pressure at a temperature of below 50°C. The residue in a quantity of 8.5 g is dissolved in a boiling solution of 3 ml of concentrated hydrochloric acid in 15 ml of water, and after adding 5 ml of 90%-ethanol the solution is cooled to a temperature of below 0°C.
The separated 1-carboethoxyhydrazinophthalazine hydrochloride is filtered and washed with anhydrous ethanol. 11.5 g of a raw product are obtained which for the purpose of purification are dissolved in 15 ml of boiling water with an addition of 10 ml of 96%-ethanol and after cooling to below 0°C, the pure 1- carboethoxyhydrazinophthalazine hydrochloride is filtered. 9.8 g of the are obtained.

Therapeutic Function

Antihypertensive