ph Test strips 0-14

pH Indicator Paper,pH test paper,pH paper Suitable for educational and industrial use Economical IndicatorLow pH colorTransition pH rangeHigh pH color

Gentian violet (Methyl violet 10B)	yellow	0.0–2.0	blue-violet
Leucomalachite green (first transition)	yellow	0.0–2.0	green
Leucomalachite green (second transition)	green	11.6–14	colorless
Thymol blue (first transition)	red	1.2–2.8	yellow
Thymol blue (second transition)	yellow	8.0–9.6	blue
Methyl yellow	red	2.9–4.0	yellow
Bromophenol blue	yellow	3.0–4.6	purple
Congo red	blue-violet	3.0–5.0	red
Methyl orange	red	3.1–4.4	orange
Bromocresol green	yellow	3.8–5.4	blue
Methyl red	red	4.4–6.2	yellow
Methyl red	red	4.5–5.2	green
Azolitmin	red	4.5–8.3	blue
Bromocresol purple	yellow	5.2–6.8	purple
Bromothymol blue	yellow	6.0–7.6	blue
Phenol red	yellow	6.8–8.4	red
Neutral red	red	6.8–8.0	yellow
Naphtholphthalein	colorless to reddish	7.3–8.7	greenish to blue
Cresol Red	yellow	7.2–8.8	reddish-purple
Phenolphthalein	colorless	8.3–10.0	fuchsia
Thymolphthalein	colorless	9.3–10.5	blue
Alizarine Yellow R	yellow	10.2–12.0	red
Litmus	red	4.5-8.3	blue

9	PH Indicator PaperPH	reel indicator pater( wideth1.23m)	100kg/roll
10	PH Indicator Paper  1-14	Universal Indicator Paper	1000book/case
11	PH Indicator Paper  1-14	Universal Indicator Paper	100 strips/box
12	PH Indicator Paper  1-14	Universal Indicator Paper	1000 rolls/case
13	PH Indicator Paper  1-14	Universal Indicator Paper	100 strips/bottle
14	PH Indicator Paper  0-14	Universal Indicator Paper	1000 rolls/case
15	PH Indicator Paper 4.0-9.0	Special Indicator Paper	100 strips/box
16	PH Indicator Paper 4.0-10.0	4.0-4.5-5.0-5.5...8.5-9.0-9.5-10.0	50 strips/bottle
17	PH Indicator Paper 4.5-9.0	4.5-5.0-5.5-6.0-6.5-7.0-7.5-8.0-8.5-9.0	100 strips/box
18	PH Indicator Paper 5.5-9.0	Special Indicator Paper	100 strips/box
19	PH Indicator Paper 5.5-9.0	Special Indicator Paper	1000book/case
20	PH Indicator Paper 5.5-9.0	Special Indicator Paper	100 strips/box
21	PH Indicator Paper 5.5-9.0	Special Indicator Paper	1000 rolls/case
22	PH Indicator Paper 7.5-9.5	7.5-7.9-8.2-8.4-8.6-8.8-9.1-9.5	100 strips/box
23	PH Indicator Paper 7.5-9.5	7.5-7.9-8.2-8.4-8.6-8.8-9.1-9.5	50 strips/bottle
24	Special Indicator Paper	PH 3.8-5.4	80 sheet/box
25	Special Indicator Paper	PH 5.5-9.0	80 sheet/box
26	Special Indicator Paper	PH 6.4-8.0	80 sheet/box
27	Phenolphthalein paper		80 sheet/box
28	Litmus Neutral Paper	5.0-8.0	80 sheet/box
29	Litmus Red Paper	5.0-8.0	80 sheet/box
30	Litmus Blue Paper		80 sheet/box
31	Congo Red paper	3.0-5.0	80 sheet/box
32	Potassium iodide starch paper		80 sheet/box
33	Saliva and Urine Indicator paper 5.5-8.0	5.5-5.8-6.0-6.2-6.4...7.6-7.8-8.8	5m/roll
34	Saliva and Urine Indicator paper 5.5-8.0	5.5-5.8-6.0-6.2-6.4...7.6-7.8-8.8	100 strips/box

particularly suitable for educational and industrial use. In schools, they are economical, as the amount of paper per student can be carefully controlled

A pH indicator is a halochromic chemical compound that is added in small amounts to a solution so that the pH (acidity or basicity) of the solution can be determined visually. Hence a pH indicator is a chemical detector for hydronium ions (H3O+) or hydrogen ions (H+) in the Arrhenius model. Normally, the indicator causes the color of the solution to change depending on the pH. At 25° Celsius, considered the standard temperature, the pH value of a neutral solution is 7.0. Solutions with a pH value below 7.0 are considered acidic, whereas solutions with pH value above 7.0 are basic. As most naturally occurring organic compounds are weak protolytes, carboxylic acids and amines, pH indicators find many applications in biology and analytical chemistry. Moreover, pH indicators form one of the three main types of indicator compounds used in chemical analysis. For the quantitative analysis of metal cations, the use of complexometric indicators is preferred, whereas the third compound class, the redox indicators, are used in titrations involving a redox reaction as the basis of the analysis.

pH indicators are frequently employed in titrations in analytic chemistry and biology experiments to determine the extent of a chemical reaction. Because of the subjective determination of color, pH indicators are susceptible to imprecise readings. For applications requiring precise measurement of pH, a pH meter is frequently used.

Tabulated below are several common laboratory pH indicators. Indicators usually exhibit intermediate colors at pH values inside the listed transition range. For example, phenol red exhibits an orange color between pH 6.8 and pH 8.4. The transition range may shift slightly depending on the concentration of the indicator in the solution and on the temperature at which it is used.

ph Test strips 0-14