Molybdic, of course.
À propos, - nickel is a part of invar, alloy which may be welded with glass. Connectors are made of that alloy.

in high-power lamps, the anode is often made of nickel foil.

The shiny coating on the glass is barium. The gas absorber located within the plate - an alloy of barium and aluminum, to which titanium or nickel powder is added.
It is impossible to make a getter from pure barium, it will be oxidized even during the assembly of the radio tube.

When heated, a reaction occurs BaAl₄ + 4Ni = 4NiAl + Ba

Nickel (or titanium) binds aluminum into a weakly evaporates NiAl compound. This avoids the evaporation of aluminum and contamination of barium in the shiny coating.
Such contamination leads to a decrease in the sorption capacity and low mechanical strength of the shiny coating.

The plate for the getter is made of invar (Fe + 36% Ni) or frigidal (Fe + 33% Ni + 1% Cr) alloy.
These alloys have very low thermal conductivity. This allows you to protect the getter from premature evaporation, in the process of degassing the radio tube.

hello! what do you think it is? unfortunately, I don't have a label photo.

N-(tert-Butoxycarbonyl)-L-alanine?
CAS 15761-38-3

thanks! maybe it is. I found isomers but they're a lot.

hello. what interesting things i can make with toluene-3,4- dithiol in organic synthesis, complexes, etc.?

This is an analytical reagent. For example, for tin and molybdenum.

Clark, R. E. D.; Neville, R. C. (1959). Toluene-3,4-dithiol and its derivatives as analytical reagents: A new approach to qualitative inorganic analysis. // Journal of Chemical Education, 36(8), 390–


Sn -
Марченко З. Фотометрическое определение элементов (1971) viewtopic.php?p=27452#p27452


Mo -
Бусев А.И. - Аналитическая химия молибдена http://chemistry-chemists.com/book5/him ... ov/Mo.djvu

thanks! I just want a solid complex in the vial, can i make it easily what do you think?

The complex with tin is insoluble in water. Dithiol is used as a solution in 2% sodium hydroxide. The solution is oxidized by air - prepare before synthesis.
(the quote from the book is in the post above).

Thank you so much!

Hello! I want to make something interesting from these compounds, I don't want polymers. what can I make? I will get any idea.

4,4'-Dichlorobiphenyl
Diphenyl sulfone
4,4'-Dichlorodiphenyl sulfone
4,4′-(Propane-2,2-diyl)diphenol

Добрый день! Есть ли у уважаемого сообщества литература или практический опыт по крашению тканей. Обратились тут ко мне волонтеры которые плетут сетки. На них надо много лоскутков тканей зеленого, коричневого и подобных цветов. Они сейчас пробуют разные натуральные штуки по типу луковой шелухи и результаты так себе. Можете что то посоветовать?

Спасибо! Попробую почитать

hello, I want to try this organic reaction. I have perchloric acid, but as I know it's hard to make chromium 2+ salts, I don't have chromium metal to make divalent salt from its amalgam. is there another way which worth to try?

Cr(III) or Cr(VI) + Zn + HCl (aq) => Cr(II) (blue)

Is it possible to use HClO4 (aq) instead of HCl (aq)? I don't know.

thank you! I've seen an atomic reduction reaction, but I thought it would not be very stable in solution. I will try to use zinc to see what comes out.

Cr(II) is easily oxidized by air. It gradually reacts with water.

thanks. yes, that's a problem.