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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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  1. Potassium iodide starch paper MN 616 T PK/200 strips

    Macherey-Nagel, Inc.

    $21.50

    Special Price $20.93

    Pack Size: box of 200 strips Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature This is a filter paper impregnated with potassium iodide (KI) and starch for the detection of nitrite and free chlorine. Nitrite or free chlorine oxidize potassium iodide to form elemental iodine which reacts with the starch in known manner. Colour reaction: white to blue-violet. Potassium iodide starch paper may be used by dipping it into the solution to be tested. More often, however, it is used in the manner of a spot test by applying drops of the solution to the paper. Depending on the type of application, we supply three grades differing in absorption properties and paper surface: MN 816 N standard grade Cat. No. 90754 MN 260 HE high sensitivity grade Cat. No. 90757 MN 616 T recommended for spot tests Cat. No. 90758 Limit of sensitivity: 1 mg/l nitrite, 1 mg/l free chlorine Recommended application: end point detection during diazotations (for this reason, potassium iodide starch paper is sometimes called Diazonium paper); general test for organic substances Learn More
  2. pH-Fix 3.1-8.3, 100 Strips / Pack

    Macherey-Nagel, Inc.

    $12.80

    Special Price $12.48

    Pack Size: box of 100 strips Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Non-bleeding indicator strips. Learn More
  3. Quantofix Cyanide Test Strips, Macherey-Nagel, PK100

    Macherey-Nagel, Inc.

    $72.00

    Special Price $70.65

    Pack Size: box of 100 strips & reagent Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Test sticks and reagents for the semi-quantitative determination of cyanide in solutions Gradation of scale: 0-1-3-10-30 mg/l CN - white to red-violet Only free cyanides or cyanide complexes which can be decomposed with chlorine are detected. Strongly alkaline solutions (pH > 10) must be adjusted to a pH of 6 - 7 using dilute sulphuric acid. Thiocyanates in excess of 1 mg/l produce a similar coloration. Iodide and bromide above 5 mg/l cause the colour to fade as does sulphide above 20 mg/l. QUANTOFIX® Cyanide *This item is hazardous and cannot ship Parcel Post. It is required to ship UPS Ground. Learn More
  4. Aquadur, PK/100 strips

    Macherey-Nagel, Inc.

    $35.60

    Special Price $34.93

    Pack Size: box of 100 strips Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Test sticks for determination of the water hardness. The hardness of water depends on its content of calcium and magnesium salts. When measuring the total hardness, the sum of these salts is determined. Gradation of scale: <55 · >90 · >180 · >270· >360 · >445 ppm Learn More
  5. Cyanuric Acid Test, PK/25 tests

    Macherey-Nagel, Inc.

    $10.50

    Special Price $10.21

    Pack Size: box of 25 tests Pack Size: roll of 5 meter length Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Storage Temp: Room Temperature Test for the determination of cyanuric acid in swimming pools. Gradation 0 - 50 - 100 - 150 - 300 mg/l Learn More
  6. Aquadur test strips, PK/1000 individually sealed

    Macherey-Nagel, Inc.

    $312.00

    Special Price $305.93

    Pack Size: Pack of 1000 individually sealed strips Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Test stick for the determination of water hardness. Gradation of scale: <55 · >70 · >150 · >250 ppm Learn More
  7. Turmeric paper, PK/200 strips

    Macherey-Nagel, Inc.

    $27.60

    Special Price $26.97

    Pack Size: box of 200 strips Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Turmeric paper is a filter paper impregnated with curcumin, the yellow dye extracted from the roots of Curcuma tinctoria (yellow ginger). It is used to detect boric acid and borates.Color reaction: yellow « red; oxidizing agents and iodide interfereApplication: The solution to be tested is acidified with dilute hydrochloric acid (pH 1 û 2); the turmeric paper is dipped into this solution and allowed to dry. Depending on the borate concentration the yellow paper turns orange to red. When the dried reaction zone is dipped into concentrated sodium hydroxide solution (NaOH), it turns greenish-black in the presence of boron compounds. The yellow turmeric paper will change color from yellow to brown-red with bases. Limit of sensitivity: 20 mg/l boron Learn More
  8. SPECIAL INDICATOR pH 8.0-10.0 dispenser, EA/5 meter length

    Macherey-Nagel, Inc.

    $5.60

    Special Price $5.47

    Pack Size: roll of 5 meter length 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: 8.0 - 8.2 - 8.4 - 8.7 - 9.0 - 9.2 - 9.6 - 10.0 Learn More
  9. DUOTEST pH 5.0-8.0 DISPENSER, EA/5 meter length

    Macherey-Nagel, Inc.

    $16.10

    Special Price $15.69

    Pack Size: roll of 5 meter length Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Indicator papers with two complimentary indicator zones on one strip. Gradation of scale: 5.0 - 5.3 - 5.6 - 5.9 - 6.2 - 6.5 - 6.8 - 7.1 - 7.4 - 7.7 - 8.0 Learn More
  10. SPECIAL INDICATOR pH 6.4-8.0 refill, PK/3 rolls only

    Macherey-Nagel, Inc.

    $11.20

    Special Price $10.78

    Pack Size: box of 3 rolls only Hazard Class /UN Number: Not Restricted Storage Temp: Room Temperature Learn More
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