Molecular Formula | C7H12Cl2N2 |
Molar Mass | 195.09 |
Density | 0.628g/cm3 at 23℃ |
Melting Point | 143-145°C (dec.)(lit.) |
Boling Point | 149.5℃ at 95.5kPa |
Water Solubility | Insoluble in water. |
Appearance | Yellow to light brown powder |
Color | Slightly yellow to beige |
BRN | 3688990 |
Storage Condition | Inert atmosphere,Room Temperature |
MDL | MFCD00012921 |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection |
UN IDs | UN 2811 6.1/PG 3 |
WGK Germany | 3 |
RTECS | MU8540000 |
FLUKA BRAND F CODES | 10 |
TSCA | Yes |
HS Code | 29280000 |
Hazard Class | 6.1 |
Packing Group | Ⅲ |
Toxicity | LD50 ipr-mus: 11 mg/kg JMCMAR 18,20,75 |
dissociation constant | 0.001-0.001 at 23 ℃ |
application | benzylhydrazine dihydrochloride is an intermediate in organic synthesis and pharmaceutical research and development, which can be used in laboratory organic research and development processes and chemical and pharmaceutical synthesis processes. |
preparation | step 1: experimental method for preparing tert-butyl isopropylidene hydrazinic acid ester (1): adding MgSO4 (about 2g) and 5 drops of HOAc to acetone (75mL) solution of tert-butyl formate (10g,75.6mmol). The mixture is heated to reflux for 1 hour, then cooled, filtered and vacuum concentrated. White solid, yield 12.58g(97%). Melting point 85-87 ℃. Step 2: General/Typical Procedure: General Preparation of Alkylated Hydrazone (2): Solid KOH (powder, 218mg,3.9mmol) and tetrabutylammonium bisulfate (100mg,0.3mmol) are added to a solution of tert-butyl isopropylidene decanoate (1) 10(516mg,3.0mmol) toluene (10mL) solution. Stir the mixture vigorously and heat to 50°C, then slowly add pure alkyl bromide (3.6mmol). Raise the temperature to 80°C and keep it until the reaction is complete, as shown in GC-MS analysis (1-3 hours). The mixture was cooled and washed with H2O until the aqueous extract had a neutral pH. The organic layer is dried (MgSO4) and vacuum concentrated to obtain a light-colored oil (2), which can be used without further purification. 2f(R = benzyl), yield 93%. Step 3: General/Typical Procedure: Monoalkyl Hydrazine (3): Add 2N HCl(2 acid equivalents) to 2 THF(0.5M) solution and heat it under reflux for 3 hours. Cool the mixture and vacuum concentrate. The residue was completely dried by adding and vacuum removing toluene (3 ×), and the yield was calculated. The resulting dihydrochloride 12 was diluted with EtOH, filtered through a filter disc (0.2mm) to remove fine particles, and stored in an amber vial at ambient temperature. 3f(R = benzyl), yield 99%. |
use | is an intermediate in organic synthesis and pharmaceutical research and development, which can be used in laboratory organic research and development processes and chemical pharmaceutical synthesis processes. |
category | toxic substances |
toxicity classification | highly toxic |
acute toxicity | abdominal cavity-mouse LD50: 11 mg/kg |
flammability hazard characteristics | combustible; combustion produces toxic nitrogen oxides and hydrogen chloride smoke |
storage and transportation characteristics | ventilation and low temperature drying; separate from warehouse food raw materials |
fire extinguishing agent | dry powder, foam, sand, carbon dioxide, mist water |