江苏省太仓市严林化工厂

DIAZOLIDINYL UREA PRODUCT IDENTIFICATION CAS NO. 78491-02-8 EINECS NO. 278-928-2 FORMULA C8H14N4O7 MOL WT. 278.23 H.S. CODE TOXICITY Oral rat LD50: 2570 mg/kg SYNONYMS Diazolidinyl urea; Germall 11; N-(1,3-bis(hydroxymethyl)-2,5-dioxo-4-imidazolidinyl)-N,N'- bis(hydroxymethyl)- Urea; N-(Hydroxymethyl)-N-(1,3-dihydroxymethyl-2,5-dioxo-4-imidazolidinyl)- N'-(hydroxymethyl)urea; 1-[1,3-bis(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]- 1,3-bis(hydroxymethyl) urea; 1-[1,3-bis(hidroximetil)-2,5-dioxoimidazolidin-4-il]-1,3- bis(hidroximetil) urea; 1-[1,3-bis(hydroxyméthyl)-2,5-dioxoimidazolidine-4-yl]- 1,3-bis(hydroxyméthyl) urée; DERIVATION CLASSIFICATION PHYSICAL AND CHEMICAL PROPERTIES PHYSICAL STATE white hygroscopic powder MELTING POINT BOILING POINT SPECIFIC GRAVITY SOLUBILITY IN WATER Very soluble pH 6.0 - 7.5 (1% Sol.) VAPOR DENSITY AUTOIGNITION NFPA RATINGS REFRACTIVE INDEX FLASH POINT STABILITY Stable under ordinary conditions APPLICATIONS Diazolidinylurea, a formaldehyde releasing substance, is used as an antimicrobial agent and preservative in cosmetics and toiletries. It is very active against gram+ and gram- bacteria as a synergist in combination with parabens. The most widely used biocides ( antiseptic agents, preservatives, bactericides, slimicides, fungicides) in cosmetics are parabens, isothiazolones, formaldehyde and formaldehyde releasing substances. Formaldehyde is the simplest aldehyde with the formula HCH=O. It is a gas at room temperature with a pungent smell. It cannot be readily isolated or handled in the pure state because it is extremely reactive. Formaldehyde reversibly polymerizes to its cyclic trimer 1,3,5-trioxane or the linear polymer polyoxymethylene. It is readily oxidized to form formic acid in the air. It is commercially available as an aqueous solution usually 37-50% w/w. Formalin is the solution of formaldehyde in water. Paraformaldehyde is a white crystalline solid formed by polymerization of formaldehyde. Formaldehyde kills most bacteria, and used as a disinfectant and as a preservative and fixative for pathologic specimens. Formaldehyde cross links amino groups. In industry formaldehyde is used in the production of thermoset resins, functional polyols, explosive, hexamine and other chemicals. Examples of formaldehyde-releasing biocides are: