Laboratory Manual for the Detection of Poisons And Powerful Drugs. Authorized Translation of the Completely Rev. 4th German Ed.
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Partheil).
Preparation. — Extract powdered ripe laburnum seeds with 60 per cent, alcohol containing acetic acid. Distil the alcohol from the extracts, pour the residue through a moist filter and precipitate extractive and tannin substances with lead acetate solution. Filter, add potassium hydroxide solution to the clear filtrate and extract cytisine with chloroform. Distil the chloroform which usually deposits cytisine as a radiating crystalline mass. If purification is neces- sary, recrystalli...ze the residue from absolute alcohol or boiling ligroin. Sub- limation in a partial vacuum also purifies -crude cytisine.
Cytisine crystallizes in large, colorless, tasteless prisms, melting at 152-153° and subliming at a higher temperature, if carefully heated. It dissolves freely in water, alcohol, chloroform and acetic ether; less easily in commercial ether, benzene and acetone; and is insoluble in petroleum ether and absolute ether.
Cytisine is a strong secondary base and very toxic. Although capable of com- bining with I or 2 molecules of hydrochloric acid, this compound behaves in other respects like a monacid base.
What to read after Laboratory Manual for the Detection of Poisons And Powerful Drugs. Authorized Translation of the Completely Rev. 4th German Ed.?
You can find similar books in the "Read Also" column, or choose other free books by Wilhelm Autenrieth to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Partheil).
Preparation. — Extract powdered ripe laburnum seeds with 60 per cent, alcohol containing acetic acid. Distil the alcohol from the extracts, pour the residue through a moist filter and precipitate extractive and tannin substances with lead acetate solution. Filter, add potassium hydroxide solution to the clear filtrate and extract cytisine with chloroform. Distil the chloroform which usually deposits cytisine as a radiating crystalline mass. If purification is neces- sary, recrystalli...ze the residue from absolute alcohol or boiling ligroin. Sub- limation in a partial vacuum also purifies -crude cytisine.
Cytisine crystallizes in large, colorless, tasteless prisms, melting at 152-153° and subliming at a higher temperature, if carefully heated. It dissolves freely in water, alcohol, chloroform and acetic ether; less easily in commercial ether, benzene and acetone; and is insoluble in petroleum ether and absolute ether.
Cytisine is a strong secondary base and very toxic. Although capable of com- bining with I or 2 molecules of hydrochloric acid, this compound behaves in other respects like a monacid base.
What to read after Laboratory Manual for the Detection of Poisons And Powerful Drugs. Authorized Translation of the Completely Rev. 4th German Ed.?
You can find similar books in the "Read Also" column, or choose other free books by Wilhelm Autenrieth to read onlineMoreLess
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