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Chemical formula Synonyms CAS number C 10 H 16 N 2 O 8: Ethylenediaminetetraacetic acid (EDTA): 6381–92–6 C 12 H 22 O 11: sucrose: 57–50–1 C 18 H 29 O 3 S: sodium dodecyl benzenesulfonate: 2155–30–0
mnemonic: 1867 was the year of Canada's confederation (formation; long-distance calls to the 867 area code must begin 1-867) 868: Trinidad and Tobago (all) June 1, 1997: split of 809; mnemonic: TNT; 869: Saint Kitts and Nevis (all) October 1, 1996: split of 809; 870: Arkansas (Texarkana, Jonesboro, Pine Bluff, and southern, eastern, and ...
The latter process provides a high-yield route to 1,1-binaphthol: [22] Such compounds are intermediates in the synthesis of BINAP and its derivatives. [20] Copper(II) chloride dihydrate promotes the hydrolysis of acetonides, i.e., for deprotection to regenerate diols [23] or aminoalcohols, as in this example (where TBDPS = tert ...
Numbering plan areas and area codes of Texas (tan). This is a list of area codes in the U.S. state of Texas. The date of establishment of each area code is indicated in parentheses: [1] 210: San Antonio area; overlays with 726 (November 1, 1992) 214: Dallas area, overlays with 469, 972, and 945 (October 1947)
Numbering plan areas and area codes of Texas with numbering plan area 281/346/713/832 highlighted. Area codes 713, 281, 832, 346, and 621 are telephone area codes in the North American Numbering Plan (NANP) forming an overlay complex for Houston, Texas and its environs. Area code 713 is one of the original four area codes established for Texas ...
Look at the area code: Start by comparing the phone number’s area code to the list of area codes you should never answer. If it’s on the list, there’s a good chance there’s a scammer on ...
Area code 210 was created on November 1, 1992, in a split from area code 512. The new numbering plan area included the San Antonio area, most of the Hill Country, and the Rio Grande Valley. Before 1992, 512 had served the entire south-central portion of Texas since the area code system was instituted by AT&T in 1947; 512 was the last of Texas ...
Numbering plan areas and area codes of Texas with numbering plan area 940 highlighted. Area code 940 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Texas in the Wichita Falls and Denton areas. It was created on July 7, 1997, in a split from area code 817.