Chemical formula for vinegar. Vinegar is composed of about 5% acetic acid. This is the major chemical component of vinegar. The systematic or proper chemical name of acetic acid is ethanoic acid. Vinegar is a weak acid produced by the oxidation of alcohol (ethanol) from wines and ciders by bacteria. It has a pleasant sour taste and is used in cooking or as a condiment.
Although he fights Aizen numerous times (minor battles), this time all of the characters in Bleach are losing terribly, but the last time he fights (battles) Aizen is episodes 309 and 310.
Ichigo is fighting Byakuya and his hollow mask appears on his face. We see his hollow fighting Byakuya and is winning but then Ichigo rips of his hollow mask and returns to normal. The hollow also talks a bit in this scene. That scene is in series 3 episode 59 Hope I helped and enjoy making your Bleach clip.