On anhydrous nitric acid

Burns from exposure to anhydrous hydrofluoric acid.

Anhydrous proton conductivities of squaric acid derivatives.

In this communication, we introduce squaric acid derivatives as anhydrous proton conductors. We report the synthesis, characterization and proton conductivities of four squaric acid derivatives. The anhydrous proton conductivity of one of the derivatives was 2.3 × 10(-3) S cm(-1) at 110 °C, comparable to the conductivity of molten 1H-1,2,3-triazole or 1H-imidazole.

Structural and Theoretical Investigation of Anhydrous 3,4,5-Triacetoxybenzoic Acid

A comprehensive investigation of anhydrous form of 3,4,5-Triacetoxybenzoic acid (TABA) is reported. Single crystal X-ray diffraction, Thermal analysis, Fourier Transform Infrared spectroscopy (FTIR) and DFT calculations were applied for TABA characterization. This anhydrous phase crystallizes in the triclinic [Formula: see text] space group (Z' = 1) and its packing shows a supramolecular motif ...

Reversible inactivation of trypsin by anhydrous formic acid.

The inactivation of lysozyme and ribonuclease by anhydrous formic acid has been shown by Josefsson and Edman (1, 2) to be reversed by adjustment of an aqueous solution of the inactivated enzyme to pH 6.0 to 8.5. Reactivation was accompanied by an uptake of base, approximately equivalent to the number of serine and threonine residues in the proteins. With both proteins an increase in the positiv...

An immunohistological study of anhydrous topical ascorbic acid compositions on ex vivo human skin.

BACKGROUND Ascorbic acid has numerous essential and beneficial functions in normal and photoaged skin. Ionisation of ascorbic acid in aqueous topical formulations leads to oxidative degradation. Ascorbic acid in an anhydrous vehicle would inherently have greater stability. OBJECTIVE The objective of this study was to observe the effects of two anhydrous formulations containing microfine parti...