CAS RN: 25895-60-7 | Product Number: S0396
Sodium Cyanoborohydride [Reducing Agent]
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|Purity / Analysis Method||>95.0%(T)|
|Molecular Formula / Molecular Weight||CH__3BNNa = 62.84|
|Physical State (20 deg.C)||Solid|
|Store Under Inert Gas||Store under inert gas|
|Condition to Avoid||Moisture Sensitive|
|Reaxys Registry Number||4152656|
|PubChem Substance ID||87575903|
|Merck Index (14)||8606|
|Appearance||White to Almost white powder to crystal|
|Purity(Iodometric Titration)||min. 95.0 %|
|Solubility in water||Completely soluble,Decomposes in contact with water|
|Degree of solubility in water||2,120 g/l 29 °C|
|Solubility (very soluble in)||Methanol|
|Solubility (soluble in)||Dimethylformamide,Tetrahydrofuran|
|Solubility (slightly sol. in)||Ethanol|
|Solubility (insoluble in)||Ether,Benzene|
|Hazard Statements||H300 + H310 + H330 : Fatal if swallowed, in contact with skin or if inhaled.
H314 : Causes severe skin burns and eye damage.
H410 : Very toxic to aquatic life with long lasting effects.
H260 : In contact with water releases flammable gases which may ignite spontaneously.
|Precautionary Statements||P501 : Dispose of contents/ container to an approved waste disposal plant.
P223 : Do not allow contact with water.
P273 : Avoid release to the environment.
P260 : Do not breathe dust/ fume/ gas/ mist/ vapors/ spray.
P270 : Do not eat, drink or smoke when using this product.
P262 : Do not get in eyes, on skin, or on clothing.
P231 + P232 : Handle under inert gas. Protect from moisture.
P271 : Use only outdoors or in a well-ventilated area.
P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P284 : Wear respiratory protection.
P370 + P378 : In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish.
P335 + P334 : Brush off loose particles from skin. Immerse in cool water/ wrap in wet bandages.
P391 : Collect spillage.
P361 + P364 : Take off immediately all contaminated clothing and wash it before reuse.
P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P301 + P330 + P331 : IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P301 + P310 + P330 : IF SWALLOWED: Immediately call a POISON CENTER/doctor. Rinse mouth.
P304 + P340 + P310 : IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor.
P305 + P351 + P338 + P310 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor.
P403 + P233 : Store in a well-ventilated place. Keep container tightly closed.
P402 + P404 : Store in a dry place. Store in a closed container.
P405 : Store locked up.
|Class||4.3 / 6.1|
To a stirred solution of N-ethylbenzylamine (675 mg, 5 mmol) and 37% aqueous formaldehyde (2 mL, 25 mmol) in acetonitrile (15 mL) is added sodium cyanoborohydride (500 mg, 8 mmol). A vigorous exothermic reaction ensues, and a dark residue separates. The reaction mixture is stirred for 15 min, and then glacial acetic acid is added dropwise until the solution tests neutral on wet pH paper. Stirring is continued for an additional 45 min, glacial acetic acid being added occasionally to maintain the pH near neutrality. The solvent is evaporated at reduced pressure, and 2 N KOH (20 mL) is added to the residue. The resulting mixture is extracted with ether (3 × 20 mL). The combined ether extracts are washed with 0.5 N KOH (20 mL) and then extracted with 1 N HCl (3 × 10 mL). The acid extracts are combined and neutralized with solid KOH and then extracted with ether (3 × 20 mL). The combined ether extracts are dried (K2CO3) and evaporated in vacuo to give N-methyl-N-ethylbenzylamine (735 mg, Y. 98%) as a colorless, GPLC-pure oil.
- Methylation of amines
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