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Azo violet (Magneson I; [1] p-nitrobenzeneazoresorcinol) is an azo compound with the chemical formula C 12 H 9 N 3 O 4. It is used commercially as a violet dye and experimentally as a pH indicator, appearing yellow below pH 11, and violet above pH 13. [2] It also turns deep blue in the presence of magnesium salt in a slightly alkaline, or basic ...
[6] The dye can also be prepared by the condensation of formaldehyde and dimethylaniline to give a leuco dye: [3] [4] [7] CH 2 O + 3 C 6 H 5 N(CH 3) 2 → CH(C 6 H 4 N(CH 3) 2) 3 + H 2 O. Second, this colourless compound is oxidized to the coloured cationic form (hereafter with oxygen, but a typical oxidizing agent is manganese dioxide, MnO 2):
Methyl violet 2B (Tetramethylparosanilinium chloride, 4,4'-[(4-Imino-2,5-cyclohexadien-1-yliden)methylen]bis(N,N-dimethylaniline)hydrochloride) is a violet triarylmethane dye from the group of cationic dyes and an essential component of C.I. Basic Violet 1 (trivial name methyl violet).
Science & Tech. Shopping. Sports. Weather. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. ... They said they are aiming to complete the panel's work by July 4 ...
The Ho Chi Minh City University of Technology (HCMUT; Vietnamese: Trường Đại học Bách khoa, Đại học Quốc gia Thành phố Hồ Chí Minh, lit. 'Polytechnic of Vietnam National University, Ho Chi Minh City') [1] is a research university in Ho Chi Minh City, Vietnam.
Science & Tech. Shopping. Sports. Weather. 24/7 Help. ... December 12, 2024 at 2:35 PM ... Oversupply would rise to 1.4 million barrels per day in 2025 if OPEC+ follows through on plans to unwind ...
That season came in 2020 when WVU went 6-4. The Mountaineers went 5-4 in Big 12 play this season though they lost two of their last three games. WVU lost 49-35 to Baylor before beating UCF by 10 ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 December 2024. Varieties of the color violet Violet Spectral coordinates Wavelength 380–450 nm Frequency 800–715 THz Color coordinates Hex triplet #8000FF sRGB B (r, g, b) (128, 0, 255) HSV (h, s, v) (270°, 100%, 100%) CIELCh uv (L, C, h) (41, 134, 275°) Source W3C B: Normalized to [0–255 ...