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Primary Reference Standard

When precision matters most, start with the highest benchmark—Primary Reference Standards from Lancetech Ltd are essential for achieving traceable and reproducible results in analytical testing. These ultra-pure substances serve as the definitive reference point for calibrating instruments, verifying methods, and producing secondary standards.


Ideal for pharmaceutical, environmental, and chemical laboratories, our primary standards ensure compliance with global regulatory requirements and support accurate quantification across a wide range of applications. Each standard is backed by detailed documentation and traceability to certified bodies, ensuring your data integrity from the first measurement onward.


Explore our range of primary reference materials and set a solid foundation for your lab’s analytical success.

Chloramphenicol Palmitate 5g
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Manufacturer: TOKU-E Item Number: C168-5G
Chloramphenicol Palmitate 5g CAS number 530-43-8 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£196.52 £218.36
Chloramphenicol Solution (50 mg/ml) 10 mL
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Manufacturer: TOKU-E Item Number: C090-10ML
Chloramphenicol Solution (50 mg/ml) 10 mL CAS number 56-75-7 and purity 40-60 mg/ml...
Price excludes taxes and shipping charges. Save -10%
£39.02 £43.35
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Chloramphenicol Solution (50 mg/ml) 10 x 10 mL
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Manufacturer: TOKU-E Item Number: C090-10x10ML
Chloramphenicol Solution (50 mg/ml) 10 x 10 mL CAS number 56-75-7 and purity 40-60 mg/ml...
Price excludes taxes and shipping charges. Save -10%
£339.59 £377.32
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Chloramphenicol succinate 25 mg
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Manufacturer: TOKU-E Item Number: C169-25MG
Chloramphenicol succinate 25 mg CAS number 3544-94-3 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£308.75 £343.06
Chloramphenicol succinate 5 mg
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Manufacturer: TOKU-E Item Number: C169-5MG
Chloramphenicol succinate 5 mg CAS number 3544-94-3 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£88.63 £98.48
Chloramphenicol succinate sodium 100 mg
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Manufacturer: TOKU-E Item Number: C170-100MG
Chloramphenicol succinate sodium 100 mg CAS number 982-57-0 and purity >95% by HPLC...
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£204.71 £227.46
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Chloramphenicol succinate sodium 25 mg
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Manufacturer: TOKU-E Item Number: C170-25MG
Chloramphenicol succinate sodium 25 mg CAS number 982-57-0 and purity >95% by HPLC...
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£58.76 £65.29
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Chloramphenicol, USP 100 g
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Manufacturer: TOKU-E Item Number: C028-100G
Chloramphenicol, USP 100 g CAS number 56-75-7 and purity 97.0% - 103.0%...
Price excludes taxes and shipping charges. Save -10%
£242.29 £269.21
Chloramphenicol, USP 25 g
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Manufacturer: TOKU-E Item Number: C028-25G
Chloramphenicol, USP 25 g CAS number 56-75-7 and purity 97.0% - 103.0%...
Price excludes taxes and shipping charges. Save -10%
£75.63 £84.03
Chloramphenicol, USP 500 g
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Manufacturer: TOKU-E Item Number: C028-500G
Chloramphenicol, USP 500 g CAS number 56-75-7 and purity 97.0% - 103.0%...
Price excludes taxes and shipping charges. Save -10%
£793.81 £882.01
Chlorhexidine 1 g
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Manufacturer: TOKU-E Item Number: C156-1G
Chlorhexidine 1 g CAS number 55-56-1 and purity (On Dried Basis): ≥ 97.5%...
Price excludes taxes and shipping charges. Save -10%
£98.26 £109.18
Chlorhexidine 5 g
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Manufacturer: TOKU-E Item Number: C156-5G
Chlorhexidine 5 g CAS number 55-56-1 and purity (On Dried Basis): ≥ 97.5%...
Price excludes taxes and shipping charges. Save -10%
£385.34 £428.16
Chlorhexidine diacetate salt 25 g
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Manufacturer: TOKU-E Item Number: C200-25G
Chlorhexidine diacetate salt 25 g CAS number 56-95-1 and purity (On Dried Basis): ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£195.56 £217.29
Chlorhexidine Dihydrochloride 25 g
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Manufacturer: TOKU-E Item Number: C157-25G
Chlorhexidine Dihydrochloride 25 g CAS number 3697-42-5 and purity (On Dried Basis): ≥ 99.5%...
Price excludes taxes and shipping charges. Save -10%
£201.83 £224.25
Chlorhexidine Dihydrochloride 5 g
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Manufacturer: TOKU-E Item Number: C157-5G
Chlorhexidine Dihydrochloride 5 g CAS number 3697-42-5 and purity (On Dried Basis): ≥ 99.5%...
Price excludes taxes and shipping charges. Save -10%
£55.87 £62.08
Chlorimuron ethyl 10 mg
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Manufacturer: TOKU-E Item Number: C109-10MG
Chlorimuron ethyl 10 mg CAS number 90982-32-4 and purity ≥95.0% (as is)...
Price excludes taxes and shipping charges. Save -10%
£129.09 £143.43
Chloroquine Phosphate 100 g
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Manufacturer: TOKU-E Item Number: C142-100G
Chloroquine Phosphate 100 g CAS number 50-63-5 and purity (On Dried Basis): 98.5-101.0% ...
Price excludes taxes and shipping charges. Save -10%
£302.01 £335.57
Chloroquine Phosphate 25 g
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Manufacturer: TOKU-E Item Number: C142-25G
Chloroquine Phosphate 25 g CAS number 50-63-5 and purity (On Dried Basis): 98.5-101.0% ...
Price excludes taxes and shipping charges. Save -10%
£93.45 £103.83
Chlorothricin 1 mg
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Manufacturer: TOKU-E Item Number: C171-1MG
Chlorothricin 1 mg CAS number 34707-92-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£144.02 £160.02
Chlorothricin 5 mg
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Manufacturer: TOKU-E Item Number: C171-5MG
Chlorothricin 5 mg CAS number 34707-92-1 and purity >95% by HPLC...
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£503.35 £559.28
Chlorsulfuron 100 mg
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Manufacturer: TOKU-E Item Number: C209-100MG
Chlorsulfuron 100 mg CAS number 64902-72-3 and purity ≥ 95.0%...
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£74.66 £82.96
Chlortetracycline 25 mg
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Manufacturer: TOKU-E Item Number: C173-25MG
Chlortetracycline 25 mg CAS number 57-62-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£389.20 £432.44
Chlortetracycline 5 mg
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Manufacturer: TOKU-E Item Number: C173-5MG
Chlortetracycline 5 mg CAS number 57-62-5 and purity >95% by HPLC...
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£111.27 £123.63
Chlortetracycline HCl, EP 100 g
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Manufacturer: TOKU-E Item Number: C029-100G
Chlortetracycline HCl, EP 100 g CAS number 64-72-2 and purity ≥ 900 pg/mg...
Price excludes taxes and shipping charges. Save -10%
£378.12 £420.13
Chlortetracycline HCl, EP 25 g
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Manufacturer: TOKU-E Item Number: C029-25G
Chlortetracycline HCl, EP 25 g CAS number 64-72-2 and purity ≥ 900 pg/mg...
Price excludes taxes and shipping charges. Save -10%
£144.99 £161.10
Chlortetracycline HCl, EP 5 g
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Manufacturer: TOKU-E Item Number: C029-5G
Chlortetracycline HCl, EP 5 g CAS number 64-72-2 and purity ≥ 900 pg/mg...
Price excludes taxes and shipping charges. Save -10%
£46.72 £51.91
Chlortetracycline Hydrochloride 100 g
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Manufacturer: TOKU-E Item Number: C072-100G
Chlortetracycline Hydrochloride 100 g CAS number 64-72-2 and purity ≥900 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£369.45 £410.50
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Chlortetracycline Hydrochloride 25 g
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Manufacturer: TOKU-E Item Number: C072-25G
Chlortetracycline Hydrochloride 25 g CAS number 64-72-2 and purity ≥900 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£131.98 £146.64
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Chlortetracycline Hydrochloride 5 g
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Manufacturer: TOKU-E Item Number: C072-5G
Chlortetracycline Hydrochloride 5 g CAS number 64-72-2 and purity ≥900 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£45.76 £50.84
Choline Chloride 100 g
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Manufacturer: TOKU-E Item Number: C086-100G
Choline Chloride 100 g CAS number 67-48-1 and purity >98%...
Price excludes taxes and shipping charges. Save -10%
£41.90 £46.56
Choline Chloride 25 g
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Manufacturer: TOKU-E Item Number: C086-25G
Choline Chloride 25 g CAS number 67-48-1 and purity >98%...
Price excludes taxes and shipping charges. Save -10%
£29.86 £33.18
Choramphenicol ReadyMadeâ„¢ Aqueous Solution 10 ml
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C294-10ML
Choramphenicol ReadyMade™ Aqueous Solution 10 ml CAS number 56-75-7 and purity 97.0%-103.0%...
Price excludes taxes and shipping charges. Save -10%
£44.79 £49.77
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Chromomycin A2 1 mg
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Manufacturer: TOKU-E Item Number: C174-1MG
Chromomycin A2 1 mg CAS number 6992-70-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£226.39 £251.54
Chromomycin A2 5 mg
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Manufacturer: TOKU-E Item Number: C174-5MG
Chromomycin A2 5 mg CAS number 6992-70-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£788.99 £876.66
Chromomycin A3 1 mg
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Manufacturer: TOKU-E Item Number: C152-1MG
Chromomycin A3 1 mg CAS number 7059-24-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£78.03 £86.70
Chromomycin A3 5 mg
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Manufacturer: TOKU-E Item Number: C152-5MG
Chromomycin A3 5 mg CAS number 7059-24-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.15 £302.39
Chrysomycin A 0.5 mg
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Manufacturer: TOKU-E Item Number: C153-0.5MG
Chrysomycin A 0.5 mg CAS number 82196-88-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£255.77 £284.19
Chrysomycin A 2.5 mg
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Manufacturer: TOKU-E Item Number: C153-2.5MG
Chrysomycin A 2.5 mg CAS number 82196-88-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.00 £993.33
Chrysomycin B 0.5 mg
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Manufacturer: TOKU-E Item Number: C154-0.5MG
Chrysomycin B 0.5 mg CAS number 83852-56-6 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£255.77 £284.19
Chrysomycin B 2.5 mg
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Manufacturer: TOKU-E Item Number: C154-2.5MG
Chrysomycin B 2.5 mg CAS number 83852-56-6 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.00 £993.33
Cidofovir dihydrate 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C202-10MG
Cidofovir dihydrate 10 mg CAS number 149394-66-1 and purity ≥ 99.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£67.91 £75.46
Cidofovir dihydrate 50 mg
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Manufacturer: TOKU-E Item Number: C202-50MG
Cidofovir dihydrate 50 mg CAS number 149394-66-1 and purity ≥ 99.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£246.14 £273.49
Cilastatin Sodium 1 g
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Manufacturer: TOKU-E Item Number: C279-1G
Cilastatin Sodium 1 g CAS number 81129-83-1 and purity 98.0-101.5%...
Price excludes taxes and shipping charges. Save -10%
£345.37 £383.74
Cilastatin Sodium 100 mg
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Manufacturer: TOKU-E Item Number: C279-100MG
Cilastatin Sodium 100 mg CAS number 81129-83-1 and purity 98.0-101.5%...
Price excludes taxes and shipping charges. Save -10%
£116.57 £129.52
Cinacalcet Hydrochloride 10 mg
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Manufacturer: TOKU-E Item Number: C242-10MG
Cinacalcet Hydrochloride 10 mg CAS number 364782-34-3 and purity 98%-102%...
Price excludes taxes and shipping charges. Save -10%
£63.59 £70.65
Cinacalcet Hydrochloride 100 mg
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Manufacturer: TOKU-E Item Number: C242-100MG
Cinacalcet Hydrochloride 100 mg CAS number 364782-34-3 and purity 98%-102%...
Price excludes taxes and shipping charges. Save -10%
£518.29 £575.88
Cinnabarinic acid 0.1 mg
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Manufacturer: TOKU-E Item Number: C268-0.1MG
Cinnabarinic acid 0.1 mg CAS number 606-59-7 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£146.92 £163.24
Cinnabarinic acid 0.5 mg
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Manufacturer: TOKU-E Item Number: C268-0.5MG
Cinnabarinic acid 0.5 mg CAS number 606-59-7 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£512.03 £568.92
Cinnamycin 1 mg
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Manufacturer: TOKU-E Item Number: C175-1MG
Cinnamycin 1 mg CAS number 110655-58-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£226.39 £251.54
Cinnamycin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C175-5MG
Cinnamycin 5 mg CAS number 110655-58-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£788.99 £876.66
Ciprofloxacin 25 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C031-25G
Ciprofloxacin 25 g CAS number 85721-33-1 and purity 98.0% - 102.0%...
Price excludes taxes and shipping charges. Save -10%
£152.21 £169.12
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