Search results
Results from the WOW.Com Content Network
In organic chemistry, the Mannich reaction is a three-component organic reaction that involves the amino alkylation of an acidic proton next to a carbonyl (C=O) functional group by formaldehyde (H−CHO) and a primary or secondary amine (−NH 2) or ammonia (NH 3). [1] The final product is a β-amino-carbonyl compound also known as a Mannich base.
Sidestream smoke in enclosed box. Sidestream smoke is smoke which goes into the air directly from a burning cigarette, cigar, or smoking pipe. [1] Sidestream smoke is the main component (around 85%) of second-hand smoke (SHS), also known as Environmental Tobacco Smoke (ETS) or passive smoking. [2]
Formaldehyde is one of the main disinfectants recommended for destroying anthrax. [55] Formaldehyde is also approved for use in the manufacture of animal feeds in the US. It is an antimicrobial agent used to maintain complete animal feeds or feed ingredients Salmonella negative for up to 21 days. [56]
ATSDR also publishes ToxFAQs, ToxGuides, and public health statements, which summarize the health information in toxicological profiles for use by the general public and health professionals. The agency maintains a Toxic Substances Portal that compiles all of the agency’s toxicology information and allows users to search by chemical.
This is the list of extremely hazardous substances defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. § 11002).The list can be found as an appendix to 40 CFR 355. [1]
In retail spaces, formaldehyde concentrations ranged from 8.0 to 19.4 μg/m 3 compared to 14.2 to 45.0 μg/m 3 in storage spaces. [90] Occupational exposure to VOCs also depends on the task. One study found that workers were exposed to peak total VOC concentrations when they were removing the plastic film off of new products. [ 90 ]
Ammonia forms 1:1 adducts with a variety of Lewis acids such as I 2, phenol, and Al(CH 3) 3. Ammonia is a hard base (HSAB theory) and its E & C parameters are E B = 2.31 and C B = 2.04. Its relative donor strength toward a series of acids, versus other Lewis bases, can be illustrated by C-B plots.
It is one of the two primary large-scale formaldehyde production methods, alongside the metal oxide process. [1] [2] The name fasil is a registered trademark owned by Dynea AS. Dynea started to produce formaldehyde in Norway in 1947 and has developed the process since then. More than 40 fasil formaldehyde plants have been installed worldwide.