Red pileated finch a white eye ring. The male has a red crest and a black crown, just as the grey pileated finch does, however its upper parts are dark wine red, with a reddish rump, and the underparts are a drab reddish colour. The red crest and black head are absent in the female and the upper parts are a little more brown than those of the male. The throat of the female is white and the underparts pink. This bird has a wide distribution in South America. Its range includes southern Brazil and northern Argentina, extending from Brasília and Rio de
Metacresol purple CO dissolves as CO is acidic. In chemistry, it has two useful indicator ranges: Metacresol purple Metacresol purple or m"-cresol purple, also called m"-cresolsulfonphthalein is a triarylmethane dye and a pH indicator that is used in medicine to detect end-tidal carbon dioxide to ensure successful tracheal intubation in an emergency as the indicator inside a colorimetric carbon dioxide detector. It can be used to measure the pH in subzero temperatures of saline or hypersaline media. In colometric capnography the indicator is incorporated in a matrix that provides a pH just above the indicator's colour change, it undergoes the colour change