Litmus pH indicator in acid (left) and base (right). Litmus is a water soluble mixture of dyes extracted from lichens. When used as a test, acids below pH 4.5 turn the dye red and bases above pH 8.3 turn the dye blue.
| px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP16425903
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
N/A
Right to Privacy:
No
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