General Chemicals
We provide affordable reagent-grade chemicals for laboratories and other technical uses. Browse our selection of ACS grade and research grade chemicals.
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Arsenic test paper HAZARDOUS, PK/200 strips
Macherey-Nagel, Inc.
$42.50
Special Price $41.46
Pack Size: box of 200 strips Hazard Class /UN Number: 3316 Storage Temp: Room Temperature (mercury bromide paper)This test paper is used for the determination of arsenic or arsine. It is based on the fact that arsine forms a coloured co-ordination compound with mercury compounds. The test paper is exposed to AsH 3 , liberated with zinc/hydrochloric acid, by holding the paper either over the test tube or over the end of a gas exhaust tube.Colour reaction: white « brown-black. The colour reaction is faster, when the paper is first moistened before being used to test for AsH 3 in air.Limit of sensitivity: 0.5 micrograms As Recommended application: determination of arsenic in grape must and wine, determination of arsine in air. In the latter case the test paper should first be moistened with acetic anhydride. This product needs additional reagents. NOT SOLD TO INDIVIDUALS. Please contact us for more information. Instruction Sheet *See Ref 91334 or 91332 for alternitive, semi-quantitative test. Arsenic test paper *This item is hazardous and cannot ship Parcel Post. It is required to ship UPS Ground. Learn More
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Phosphatesmo MI, PK/50 strips
Macherey-Nagel, Inc.
$41.60
Special Price $40.61
Pack Size: box of 50 strips Hazard Class /UN Number: Not Restricted Storage Temp: REF Test paper for the determination of alkaline phosphatase in milk. Phosphatesmo MI *Item is shipped cold*, express service may be required during summer months. Shipping charge shown here will not reflect additional charge. You will be contacted prior to shipping with correct cost. Learn More
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UNIVERSAL pH 1-14 PAPER 26 feet x 5/8 inch, EA/26 ft length
Macherey-Nagel, Inc.
$9.20
Special Price $8.63
Pack Size: roll of 26 ft length x 5/8 inches Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Test papers produced by total impregnation of the paper with a pH indicator or a mixture of several indicators. Gradation of scale: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 -13 -14 Learn More
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VISO ECO SULPHATE, PK/100 tests
Macherey-Nagel, Inc.
$93.00
Special Price $90.57
Pack Size: 1 kit (~100 tests) Hazard Class /UN Number: 3316 Storage Temp: Room Temperature Environmental test kit for Sulfate. Gradation of scale: 25 - 30 - 35 - 40 - 50 - 60 - 70 - 80 - 100 - 120 - 150 - 200 mg/L SO42. *This item is hazardous and cannot ship Parcel Post. It is required to ship UPS Ground* Learn More
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Lead Acetate Paper Refill, PK/3 reels
Macherey-Nagel, Inc.
$16.00
Special Price $15.60
Pack Size: Refil pack of 3 reels Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Lead acetate paper is a filter paper impregnated with lead acetate. It reacts with hydrogen sulfide changing color from white to brown-black. Lead acetate reacts with Hydrogen sulfide to yield black lead sulfide. In the presence of low hydrogen sulfide concentrations, however, the white paper assumes a brown color only. Limit of sensitivity: 1 drop of a solution of 5 mg/liter sulfide gives a brown ring, which is just visible. Presentation: dispenser (reel 5 m x 7 mm) Learn More
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TRITEST pH 1-11 DISPENSER, EA/5 meter length
Macherey-Nagel, Inc.
$17.20
Special Price $16.76
Pack Size: roll of 5 meter length Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Learn More
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Litmus paper, blue 8.0-5.0, EA/100
Macherey-Nagel, Inc.
$4.00
Special Price $3.90
Pack Size: booklet of 100 Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Learn More
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Litmus paper neutral, EA/5 meter length
Macherey-Nagel, Inc.
$5.55
Special Price $5.40
Pack Size: roll of 5 meter length Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Learn More
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Oil test paper, PK/100 strips
Macherey-Nagel, Inc.
$36.80
Special Price $35.94
Pack Size: reel 5 m The test paper allows the quick and easy detection of hydrogen sulphide. This gas occurs in the processing of raw oil. It is toxic even in low concentrations. Therefore, critical points are carefully checked. Sulphide containing solutions also give a positive reaction. Lead acetate is toxic and the test paper needs to be declared as hazardous. The technically equivalent Sulphide test paper (REF 90761) is a non-toxic and safe alternative Learn More
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Chromium test paper ,see Quantofix Chromate 91301 as an alternative, Hazardous
Macherey-Nagel, Inc.
$35.60
Special Price $34.77
Pack Size: box of 200 strips Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature This test paper shows violet spots on a white background upon application of solutions containing chromium. The reaction is based on the presence of chromium as chromate. Cr 3+ ions must be converted to chromate. Interferences caused by mercury salts or molybdates are readily circumvented. Limit of sensitivity: 2 mg/l Cr 3+ corresponding to 5 mg/l chromate Note: Non-destructive tests for the detection of chromium in metal alloys are carried out as follows: Apply a drop of a proper acid solution (1 part hydrochloric acid 37 % + 4 parts hydrogen peroxide 3 %) to the degreased steel surface, wait 10 to 30 seconds, add some drops of sodium hydroxide solution and cover the precipitate with filter paper. Press the chromium test paper on top of the filter paper. In the presence of chromium, a violet spot appears when the test paper is bathed in dilute sulphuric acid.Limit of sensitivity: 0.1 % Cr *TEST PROCEDURE IS INTRICATE, PRODUCT NOT RECOMMENDED FOR USE BY NON CHEMIST* REQUEST TEST PROCEDURE PRIOR TO ORDERING. Chromium test paper *TEST PROCEDURE IS INTRICATE, PRODUCT NOT RECOMMENDED FOR USE BY NON CHEMIST* REQUEST TEST PROCEDURE PRIOR TO ORDERING (see QUANTOFIX® Chromate 91301 as an alternative) *Additional reagents are required to perform this test, they are not included with this item. Learn More