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1,4-Dichlorobenzene (1,4-DCB, p-DCB, or para-dichlorobenzene, sometimes abbreviated as PDCB or para) is an aryl chloride and isomer of dichlorobenzene with the formula C 6 H 4 Cl 2. This colorless solid has a strong odor. The molecule consists of a benzene ring with two chlorine atoms (replacing hydrogen atoms) on opposing sites of the ring.
The latter chemical is also variously labeled as para-dichlorobenzene, p-dichlorobenzene, pDCB, or PDB, making it harder to identify unless all these names and initialisms are known to a potential purchaser. Both of these formulations have the strong, pungent, sickly-sweet odor often associated with mothballs.
1,2-Dichlorobenzene, or orthodichlorobenzene (ODCB), is an aryl chloride and isomer of dichlorobenzene with the formula C 6 H 4 Cl 2. This colourless liquid is poorly soluble in water but miscible with most organic solvents. It is a derivative of benzene, consisting of two adjacent chlorine atoms.
As these products originally contained para-dichlorobenzene (pDCB) they may also be called para blocks. Besides disinfecting, the purpose of these materials is to deodorize restroom urinals. [ 1 ] They are placed above the urinal drain, often in the confines of a small plastic device called a urinal screen that prevents loss down the drain when ...
The cobaloxime is slowly decomposed by acids and bases. With acids, the products of decomposition are dimethylglyoxime, cobalt salts, and pyridine; with bases, derivatives of other cobaloximes are formed, usually with the release of chloride ions. The complex has no reaction with hydrogen gas, and cannot carry oxygen as salcomine does.
p-Phenylenediamine (PPD) is an organic compound with the formula C 6 H 4 (NH 2) 2.This derivative of aniline is a white solid, but samples can darken due to air oxidation. [1] It is mainly used as a component of engineering polymers and composites like kevlar.
Bis(acetonitrile)palladium dichloride is the coordination complex with the formula PdCl 2 (NCCH 3) 2.It is the adduct of two acetonitrile ligands with palladium(II) chloride.It is a yellow-brown solid that is soluble in organic solvents.
This article provides a comprehensive list of pesticides currently subject to specific regulatory restrictions in India as of 31 March 2024. Restrictions are implemented to protect public health, the environment, and to ensure safer agricultural practices by limiting the use, production, and application of certain pesticides.