BERYLLIUM ACETATE BASIC Property

Melting point:

285-286°

Boiling point:

bp 330-331°

Density 

1.25

color 

Colorless cubic crystals from CHCl3

Safety

RIDADR 

1566

HazardClass 

6.1(a)

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H301Toxic if swalloed

H315Causes skin irritation

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H330Fatal if inhaled

H335May cause respiratory irritation

H350May cause cancer

H372Causes damage to organs through prolonged or repeated exposure

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

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.

P272Contaminated work clothing should not be allowed out of the workplace.

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

P284Wear respiratory protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

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.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P310Immediately call a POISON CENTER or doctor/physician.

P314Get medical advice/attention if you feel unwell.

P320Specific treatment is urgent (see … on this label).

P321Specific treatment (see … on this label).

P330Rinse mouth.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P333+P313IF SKIN irritation or rash occurs: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

P363Wash contaminated clothing before reuse.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

BERYLLIUM ACETATE BASIC Chemical Properties,Usage,Production

Chemical Properties

Basic beryllium acetate is the best known of the beryllium salts of organic acids which can be divided into normal beryllium carboxylates, Be(RCOO)2, and beryllium oxide carboxylates, Be4O(RCOO)6. The basic acetate is soluble in glacial acetic acid and can readily be crystallized therefrom in very pure form. It is also soluble in chloroform and other organic solvents. It has been used as a source of pure beryllium salts.

Production Methods

Method I: Basic beryllium carbonate (40 g) is mixed with 80 ml of glacial acetic acid and stirred, with heating, until CO2 evolution ceases. The end of the reaction is also recognized by the start of precipitation of white, semi-translucent crystals; otherwise, there is an amorphous white residue. The solution is cooled to room temperature, and the crystallized basic acetate is filtered off and dried in air. The crude product is treated with 60-80 ml of chloroform, and any insoluble residue is removed by filtration. The basic salt, which crystallizes in colourless octahedra, is filtered off and freed of residual chloroform in a vacuum desiccator. Beryllium oxyacetate melts at 284°C and sublimes without a residue at reduced pressure. The yield is 28 g.
Method II: A method described by Hardt avoids contamination of the product by ammonium salts and solvent occlusions and makes purification by sublimation unnecessary. Beryllium hydroxide or basic beryllium carbonate is stirred with glacial acetic acid to a paste and evaporated to dryness in a laboratory oven at 120 to 130°C. The crude product thus formed is extracted with glacial acetic acid in a Soxhlet apparatus (using a glass wool filter); after cooling, it crystallizes from the extract in well-formed octahedra, filtered off and dried at 130°C. This is followed by a second Soxhlet extraction with CCl4 since the ammonium salts from the starting material remain undissolved. The product is analytically pure after drying at 100°C.

Safety Profile

Confirmed carcinogen. SeeBERYLLIUM COMPOUNDS. When heated todecomposition it emits toxic fumes of BeO.

Solubility in organics

Very soluble in chloroform; readily soluble in boiling benzene, toluene, xylene, Tetralin and glacial acetic acid; less soluble in CCl4, acetic anhydride and acetyl chloride; sparingly soluble (0.3%) in diethyl ether. In anhydrous boiling methanol, following initial dissolution, splits off acetic anhydride with the formation of highly aggregated basic acetates. It is quite stable in cold water but is rapidly hydrolyzed in hot water.