Progress Report... Now: isomerically-pure, six-carbon aldehyde
Good source of yellow pigments
CARBIDE is now offering commercial quantities of 2-methylpentaldehyde. This colorless liquid is almost insoluble in water, though miscible with ethanol and other organic solvents. 2 - M e t h y l p e n t a l d e h y d e boils a t 118.3° C. at atmospheric pressure. It sets to a glass below —100° C. Its solubility in water is 0.42% by weight. Molecular weight is 100.16. 2-Methylpentaldehyde is easily oxidized to 2-methylpentanoic acid or reduced to the corresponding alcohol. It undergoes typical aldol reactions with aldehydes to form higher molecular weight condensation products. In reaction with formaldehyde, followed by hydrogenation of the reaction product, 2-methyl-2-propyl-l, 3-propanediol is obtained. This diol is an intermediate in the preparation of m e p r o b a m a t e tranquilizers.
It is impossible to keep colorful playthings out of the mouths of babies and toddlers. Consequently, for their health protection, toys and nursery equipment must be painted in colors that are non-toxic. Among t h e p i g m e n t s p o p u l a r for coating toys are the "Hansa" yellows. These pigments, being less toxic than chrome or cadmium colors, are favored for enamels used to coat cribs and other nursery furniture. In the same organic family are the benzidine yellows, often utilized in printing inks and textile-printing colors. In such applications, ease of dispersion is an advantage. Both "Hansa" and benzidine pigments are useful in tinting rubber and plastic materials, as well as for dope coloring of synthetic fibers. Because of their alkali resistance, the "Hansa" pigments are also frequently used in latex paints. To produce "Hansa" and benzidine pigments, CARBIDE'S acetoacetarylamides with diazo or tetrazo compounds are widely used. The resulting colors have high tinctorial strength and are not darkened by atmospheric sulfur. The acetoacetarylamides available from CARBIDE are as follows: Acetoacetanilide
Since 2-methylpentaldehyde contains a reactive carbonyl group, it is easily converted to the cyanohydrin, hydroxy acid, acetal, or to other organic compounds that may be of value in the synthesis of pharmaceuticals, plasticizers, rubber chemicals, dyes, resins, and insecticides. 2-Methylpentaldehyde is supplied by CARBIDE in tank car or tank truck quantities, in compartment tank oars or trucks with other CARBIDE chemicals, or in 55-gal. drums (LCL or carload lots). Samples are also available. For detailed information, call the Technical Representative in your nearest CARBIDE office.
A Technical Information Bulletin on 2-methylpentaldehyde can be obtained by checking the coupon. 20 C & E N
,NHCOCH 2 COCH 3
Acetoacet-ortho-chloranih'de
NHCOCH2COCH3
CI
Acetoacet-ortho-anisidide
NHCOCH2COCH3
—2-Methyipentatdehyde — Non-toxic Pigments
Acetoacet-ortho-toluidide
CARBIDE'S
acetoacetarylamides
are
flaky-white, crystalline solids, resembling ethyl acetoacetate in reactivity. Reactions of the acetoacetarylamides with chlorines, amines, and other chemicals are contained in a technical bulletin now available. Also included are physical properties, specifications, and shipping data. For a copy, please use the coupon. Tear out this c o u p o n . Check the boxes on which you'd like more information, and mail to Dept. H, Union Carbide Chemicals Company, 270 Park Avenue, New York 17, N. Y. • 2-Methylpentaldehyde • Acetoacetarylamides • 1960 Physical Properties of Synthetic Organic Chemicals — a comprehensive description of the properties and applications of nearly 400 CARBIDE chemicals. Na
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And remember, there is a CARBIDE sales office near you where you can obtain the services of a CARBIDE Technical Representative. His wide industry experience is backed both by extensive chemical training and by Technical Specialists.
UNION CARBIDE CHEMICALS COMPANY UNION CARBIDE
