Alkali Blue (C.I. 42765), Indicator, Merck KGaA (CAT#: STEM-L-1193-LKN)

The Alkali Blue (C.I. 42765) from Merck KGaA passes application test for DIN 51558.

Analysis Notes:
Identity (UV/VIS-Spectrum): passes test.
Transition range: pH 11.5 - pH 13.0 blue-violet - dark-pink.
Absorption maximum λmax. (Ethanol): 597 - 602 nm.
Spec. Absorptivity A 1%/1cm (λmax; 0.003 g/l; ethanol abs.; calculated on dried substance): ≥ 1000.
TLC-Test: passes test.
Loss on drying (110 °C): ≤ 5 %.

InChI key: DVPLSZDCYOJSOG-UHFFFAOYSA-N.
Storage conditions: Store at +5°C to +30°C.

Alkali Blue Solution, Indicator, Merck KGaA (CAT#: STEM-L-1192-LKN)
Alkali Blue (C.I. 42765), Indicator, Merck KGaA (CAT#: STEM-L-1193-LKN)