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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.
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 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.
The British Reserve Fleet was a repository for British decommissioned warships from about 1800 until 1960. [5]The United States National Defense Reserve Fleet (NDRF), consisted of about fifty World War II ships that were moored in Suisun Bay (Suisun Bay Reserve Fleet) near San Francisco since the 1950s or '60s. [6]
Watch Notre Dame vs Ohio State football live with Fubo (free trial) For the first time ever, the championship game on ESPN will be presented in 4K. ... Thursday, Jan. 2: vs. No. 2 Georgia (CFP ...
The last image we have of Patrick Cagey is of his first moments as a free man. He has just walked out of a 30-day drug treatment center in Georgetown, Kentucky, dressed in gym clothes and carrying a Nike duffel bag. The moment reminds his father of Patrick’s graduation from college, and he takes a picture of his son with his cell phone.
Aircraft carriers stored at the NISMF in Bremerton, 2012.From left to right: Independence, Kitty Hawk, Constellation and Ranger. A Naval Inactive Ship Maintenance Facility (NISMF) is a facility owned by the United States Navy as a holding facility for decommissioned naval vessels, pending determination of their final fate.