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n-butanol (CH3CH2CH2CH2OH )
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(Price is for domestic US market only)
n-butanol (CH3CH2CH2CH2OH )
Item Name:
n-butanol (CH3CH2CH2CH2OH )
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1-Butanol CH3CH2CH2CH2OH



Measuring Range

10 to 150 ppm

Number of Pump Strokes


Correction Factor


Sampling Time

3 minutes per pump stroke

Detecting Limit

1 ppm (n=3)

Color Change

Yellow Pale blue

Reaction Principle

n-Butyl alcohol reduces potassium dichromate to form chromic sulfate,
which is pale blue in color

CH3 ( CH2) 3OH+ K2Cr2O7 + H3PO4 Cr2(SO4)3

Coefficient of Variation 15% (for 2.5 to 30 ppm), 10% (for 30 to 150 ppm)
Shelf Life 3 Years
Corrections for
temperature & humidity
Temperature correction is necessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences (NOTE)




Change color by itself



Plus error

Produce similar stain by themselves.

Calibration gas generation Diffusion tube method

TLV-TWA TLV-STEL Explosive range
- - 1.4 to 11.2%

Range 10-150

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