Hardness Chemistries


Hach, Core & Main, and LaMotte offer specialized hardness chemistries for water quality analysis, including reagents and test kits that measure calcium and magnesium concentrations using titration and colorimetric methods. These products support accurate field and lab testing with features like drop-count kits, digital titrators, and direct-reading burettes, helping users monitor total hardness in drinking water, wastewater, and environmental samples.

Hach CalVer® 2 Calcium Indicator, 454 g, 28101H
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Hach CalVer 2 Calcium Indicator 454 g 28101H
$79.59

Mfr. Part # 28101H

Product # 702745

Hach CalVer® 2 Calcium Indicator, 113 g, 28114H
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Hach CalVer 2 Calcium Indicator 113 g 28114H
$43.75

Mfr. Part # 28114H

Product # 702746

Hach EDTA Standard Solution, 0.035N, 100 mL MDB, 2349932
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Hach EDTA Standard Solution, 0.035N, 100 mL MDB, 2349932
$27.39

Mfr. Part # 2349932

Product # 701463

Hach Calcium/Magnesium Indicator Solution, 100 mL MDB, 2241832
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Hach Calcium/Magnesium Indicator Solution, 100 mL MDB, 2241832
$38.25

Mfr. Part # 2241832

Product # 701318

Hach Alkali Solution for Calcium and Magnesium, 100 mL MDB, 2241732
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Hach Alkali Solution for Calcium & Magnesium 100 mL MDB 2241732
$34.29

Mfr. Part # 2241732

Product # 701316

Hach EDTA Solution, 1M, 50 mL SCDB, 2241926
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Hach EDTA Solution, 1M, 50 mL SCDB, 2241926
$25.09

Mfr. Part # 2241926

Product # 701320

Hach EDTA Digital Titrator Cartridge, 0.800 M, 1439901
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Hach EDTA Digital Titrator Cartridge, 0.800 M, 1439901
$32.05

Mfr. Part # 1439901

Product # 701017

Hach EDTA Digital Titrator Cartridge, 0.0800 M, 1436401
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Hach EDTA Digital Titrator Cartridge, 0.0800 M, 1436401
$31.39

Mfr. Part # 1436401

Product # 701002

Hach Rochelle Salt Solution, 29 mL DB, 172533
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Hach Rochelle Salt Solution, 29 mL DB, 172533
$21.95

Mfr. Part # 172533

Product # 700771

Hach CalVer® 2 Calcium Indicator Powder Pillows, pk/100, 94799
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Hach CalVer 2 Calcium Indicator Powder Pillows pk/100 94799
$33.15

Mfr. Part # 94799

Product # 700701

Hach UniVer® 3 Hardness Reagent Powder Pillows, pk/100, 96299
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Hach UniVer 3 Hardness Reagent Powder Pillows pk/100 96299
$30.59

Mfr. Part # 96299

Product # 700702

Hach ManVer® 2 Hardness Indicator Powder Pillows, pk/100, 92899
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Hach ManVer 2 Hardness Indicator Powder Pillows pk/100 92899
$34.50

Mfr. Part # 92899

Product # 700696

Hach CalVer® 2 Calcium Indicator Powder Pillows, 50 mL sample, pk/100, 85299
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Hach CalVer 2 Calcium Indicator Powder Pillows 50 mL Sample Pack of 100 85299
$33.15

Mfr. Part # 85299

Product # 700684

Hach Hardness 3 Solution, 1 L, 42653
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Hach Hardness 3 Solution, 1 L, 42653
$61.45

Mfr. Part # 42653

Product # 700646

Hach Manver 2 Hardness Indicator Powder Pillows, 50 mL Sample, pk/100, 85199
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Hach Manver 2 Hardness Indicator Powder Pillows, 50 mL Sample, pk/100, 85199
$28.55

Mfr. Part # 85199

Product # 700683

Hach Hardness 3 Solution, 100 mL MDB, 42632
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Hach Hardness 3 Solution, 100 mL MDB, 42632
$15.20

Mfr. Part # 42632

Product # 700644

Hach Hardness 3 Solution, 500 mL, 42649
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Hach Hardness 3 Solution, 500 mL, 42649
$43.85

Mfr. Part # 42649

Product # 700645

Hach Hardness 2 Indicator Solution, 100 mL MDB, 42532
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Hach Hardness 2 Indicator Solution, 100 mL MDB, 42532
$27.89

Mfr. Part # 42532

Product # 700642

Hach Hardness 2 Solution, 500 mL, 42549
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Hach Hardness 2 Solution, 500 mL, 42549
$49.09

Mfr. Part # 42549

Product # 700643

Hach Hardness 1 Buffer Solution, 1 L, 42453
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Hach Hardness 1 Buffer Solution, 1 L, 42453
$71.59

Mfr. Part # 42453

Product # 700641

Hach Hardness 1 Buffer Solution, 100 mL MDB, 42432
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Hach Hardness 1 Buffer Solution, 100 mL MDB, 42432
$25.29

Mfr. Part # 42432

Product # 700639

Hach Hardness 1 Buffer Solution, 500 mL, 42449
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Hach Hardness 1 Buffer Solution, 500 mL, 42449
$41.59

Mfr. Part # 42449

Product # 700640

Hach ManVer 2 Hardness Indicator Powder, 113g, 28014
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Hach ManVer 2 Hardness Indicator Powder, 113 g, 28014
$64.49

Mfr. Part # 28014

Product # 700609

Hach EDTA Standard Solution, 0.0200N, 4 L, 20556
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Hach EDTA Standard Solution, 0.0200N, 4 L, 20556
$64.85

Mfr. Part # 20556

Product # 700588

Hach EDTA Standard Solution, 0.0200N, 1 L, 20553
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Hach EDTA Standard Solution, 0.0200N, 1 L, 20553
$31.00

Mfr. Part # 20553

Product # 700587

Hach Hardness TNTplus Vial Test, 20 - 350 mg/L as CaCO₃ , 25 Tests, TNT869
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Hach Hardness TNTplus Vial Test, 20 - 350 mg/L as CaCO₃, 25 Tests, TNT869
$110.00

Mfr. Part # TNT869

Product # 700182

Hach Potassium Hydroxide Standard Solution, 8.00 N, 100 mL MDB, 28232H
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Hach Potassium Hydroxide Standard Solution, 8.00 N, 100 mL MDB, 28232H
$19.59

Mfr. Part # 28232H

Product # 702747

Hach UniVer® 3 Hardness Reagent, 454 g, 21301H
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Hach UniVer 3 Hardness Reagent 454 g 21301H
$87.19

Mfr. Part # 21301H

Product # 702690

Hach CDTA Reagent, 30 mL SCDB, 2589723
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Hach CDTA Reagent, 30 mL SCDB, 2589723
$37.69

Mfr. Part # 2589723

Product # 701718

Hach Chlorophosphonazo Indicator Solution for ULR Hardness, 500 mL, 2589549
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Hach Chlorophosphonazo Indicator Solution for ULR Hardness, 500 mL, 2589549
$1,307.00

Mfr. Part # 2589549

Product # 701716

Hach Hardness Chemkey® Reagents Low Range, 3-100 mg/L CaCO3, Box of 25, 8636400
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Hach Chemkey Reagents Hardness Low Range 3-100 mg/L CaCO3 25/Box 8636400
$31.65

Mfr. Part # 8636400

Product # 700122

Hach Hardness Chemkey® Reagents High Range, 90-750 mg/L CaCO3, 25/Box, 8636300
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Hach Chemkey Reagents Hardness High Range 90-750 mg/L CaCO3 25/Box 8636300
$38.75

Mfr. Part # 8636300

Product # 700121

Hach Calcium Standard Solution, 1000 mg/L as CaCO₃, 1 L, 12153
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Hach Calcium Standard Solution, 1000 mg/L as CaCO₃, 1 L, 12153
$61.89

Mfr. Part # 12153

Product # 700559

Hach Calcium Standard Solution, 10 mg/L, 100 mL, 2305442
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Hach Calcium Standard Solution, 10 mg/L, 100 mL, 2305442
$43.85

Mfr. Part # 2305442

Product # 701403

Hach Calcium Standard Solution, 1000 mg/L, 500 mL, 2240349
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Hach Calcium Standard Solution, 1000 mg/L, 500 mL, 2240349
$52.45

Mfr. Part # 2240349

Product # 701314

Hach Calcium Hardness Standard Solution, 10,000 mg/L as CaCO₃ (NIST), 10-mL, Pack of 16, 218710
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Hach Calcium Hardness Standard Solution, 10,000 mg/L as CaCO₃ (NIST), 10-mL, Pack of 16, 218710
$89.39

Mfr. Part # 218710

Product # 700838

Hach Calcium Standard Solution, 100 mg/L, 500 mL, 4457649
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Hach Calcium Standard Solution, 100 mg/L, 500 mL, 4457649
$52.45

Mfr. Part # 4457649

Product # 702089

Hach Hardness Quality Control Standard, Low Range, 500 mL, 2833449
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Hach Hardness Quality Control Standard, Low Range, 500 mL, 2833449
$87.25

Mfr. Part # 2833449

Product # 701957

Hach Hardness Quality Control Standard, High Range, 500 mL, 2833349
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Hach Hardness Quality Control Standard, High Range, 500 mL, 2833349
$87.25

Mfr. Part # 2833349

Product # 701956

Core & Main Hardness Reagent, EDTA, 0.01M, 500 mL
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Core & Main Hardness Reagent, EDTA, 0.01M, 500 mL
$12.05

Mfr. Part # ED2001-P

Product # 706987

Core & Main Hardness Buffer Solution, 1 L
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Core & Main Hardness Buffer Solution, 1 L
$31.80

Mfr. Part # HA7405-Q

Product # 707036

Core & Main Hardness Buffer Solution, 500 mL
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Core & Main Hardness Buffer Solution, 500 mL
$20.00

Mfr. Part # HA7405-P

Product # 707035

Core & Main EDTA Titrant, 0.02M +/-0.0002M, NIST Traceable, 4 L
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Core & Main EDTA Titrant, 0.02M +/-0.0002M, NIST Traceable, 4 L
$55.40

Mfr. Part # ED2002-G

Product # 706992

Core & Main Eriochrome Black T Indicator, 120 mL
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Core & Main Eriochrome Black T Indicator, 120 mL
$17.25

Mfr. Part # EB1775-C

Product # 707314

Core & Main Eriochrome Black T Indicator, 500 mL
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Core & Main Eriochrome Black T Indicator, 500 mL
$41.40

Mfr. Part # EB1775-P

Product # 707315

Core & Main EDTA Titrant, 0.02M +/-0.0002M, NIST Traceable, 500 mL
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Core & Main EDTA Titrant, 0.02M +/-0.0002M, NIST Traceable, 500 mL
$13.35

Mfr. Part # ED2002-P

Product # 706990

Core & Main EDTA Titrant, 0.01M, 4 L
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Core & Main EDTA Titrant, 0.01M, 4 L
$39.65

Mfr. Part # ED2001-G

Product # 706989

Core & Main EDTA Titrant, 0.02M +/-0.0002M, NIST Traceable, 1 L
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Core & Main EDTA Titrant, 0.02M +/-0.0002M, NIST Traceable, 1 L
$24.20

Mfr. Part # ED2002-Q

Product # 706991