410 Ind. Admin. Code 7-21-23

Current through November 27, 2024

Section 410 IAC 7-21-23 - "pH" defined

Authority: IC 16-42-5-5

Affected: IC 16-42-5

Sec. 23.

"pH" means the symbol for the negative logarithm of the hydrogen ion concentration, which is a measure of the degree of acidity or alkalinity of a solution. Values between zero (0) and seven (7) indicate acidity, and values between seven (7) and fourteen (14) indicate alkalinity. The value for pure distilled water is seven (7), which is considered neutral.

410 IAC 7-21-23

Indiana State Department of Health; 410 IAC 7-21-23; filed Jan 7, 2002, 10:16 a.m.: 25 IR 1617, eff one hundred twenty (120) days after filing with secretary of state; readopted filed Jul 14, 2008, 2:14 p.m.: 20080806-IR-410080322RFA

Readopted filed 9/10/2014, 2:08 p.m.: 20141008-IR-410140299RFA

Readopted filed 9/10/2020, 2:11 p.m.: 20201007-IR-410200404RFA