Developing agents tanning developers

Use Intermediate for accelerators, dyes, pharmaceuticals, insecticides, fungicides, surface active agents, tanning, dyeing of acetate textiles, fuel additive, polymerization inhibitor, component of paint removers, solvent, photographic developer, rocket propellent. 

As a developing agent, catechol tans the surface gelatin of the negative (see Tanning Developers, below). It is also easy to use catechol to compound formulas that create a desirable image stain density when low quantities of preservative (e.g., sodium sulfite) are used (see Image Stain, below). Both of these properties it shares in common with pyro. 

There are other developing agents, chief among them hydroquinone, that will produce a tanned image when used in a formula similar to D-175 (Formulas Extreme Compensating Developers D-175 Tanning Developer). Even so, pyro/cat are the two most commonly used for this purpose. 

The earliest claim, before the development of the electrolytic process, was for the use of oxystarch as a textile sizing-agent because of its alkali-lability, it could easily be removed from the yarn. Another use in textiles is for a highly alkali-soluble lace-backing from periodate-oxidized, cyano-ethylated-cellulose textiles. Because of its aldehydic character, oxystarch has been claimed as a useful tanning agent. - Oxystarches (D.O. 40-... 

Hazardous Decomp. Prods. Heated to decomp, emits CO, CO2, NOx, ammonia, traces of organic compds. inc. hydrogen cyanide, nitriles, isocyanates, nitrosamines, amines NFPA Health 3, Flammability 4, Reactivity 0 Uses Intermediate in organic synthesis intermediate for water-gel explosives, accelerators, pharmaceuticals, insecticides, N-methylpyrrolidine, methylalkanolamines, surface active agents, fungicides in tanning component of photographic developers and paint removers fuel additive prod, of dyes polymerization inhibitor rocket propellant See also Methylamine... 

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