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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.

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
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...
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£39.02 £43.35
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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...
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£339.59 £377.32
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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
Manufacturer: TOKU-E Item Number: C169-5MG
Chloramphenicol succinate 5 mg CAS number 3544-94-3 and purity >95% by HPLC...
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£88.63 £98.48
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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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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Manufacturer: TOKU-E Item Number: C028-100G
Chloramphenicol, USP 100 g CAS number 56-75-7 and purity 97.0% - 103.0%...
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£242.29 £269.21
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
Manufacturer: TOKU-E Item Number: C028-500G
Chloramphenicol, USP 500 g CAS number 56-75-7 and purity 97.0% - 103.0%...
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£793.81 £882.01
Manufacturer: TOKU-E Item Number: C156-1G
Chlorhexidine 1 g CAS number 55-56-1 and purity (On Dried Basis): ≥ 97.5%...
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£98.26 £109.18
Manufacturer: TOKU-E Item Number: C156-5G
Chlorhexidine 5 g CAS number 55-56-1 and purity (On Dried Basis): ≥ 97.5%...
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£385.34 £428.16
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
Manufacturer: TOKU-E Item Number: C157-25G
Chlorhexidine Dihydrochloride 25 g CAS number 3697-42-5 and purity (On Dried Basis): ≥ 99.5%...
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£201.83 £224.25
Manufacturer: TOKU-E Item Number: C157-5G
Chlorhexidine Dihydrochloride 5 g CAS number 3697-42-5 and purity (On Dried Basis): ≥ 99.5%...
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£55.87 £62.08
Manufacturer: TOKU-E Item Number: C109-10MG
Chlorimuron ethyl 10 mg CAS number 90982-32-4 and purity ≥95.0% (as is)...
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£129.09 £143.43
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% ...
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£302.01 £335.57
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% ...
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£93.45 £103.83
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
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
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
Manufacturer: TOKU-E Item Number: C173-25MG
Chlortetracycline 25 mg CAS number 57-62-5 and purity >95% by HPLC...
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£389.20 £432.44
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
Manufacturer: TOKU-E Item Number: C029-100G
Chlortetracycline HCl, EP 100 g CAS number 64-72-2 and purity ≥ 900 pg/mg...
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£378.12 £420.13
Manufacturer: TOKU-E Item Number: C029-25G
Chlortetracycline HCl, EP 25 g CAS number 64-72-2 and purity ≥ 900 pg/mg...
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£144.99 £161.10
Manufacturer: TOKU-E Item Number: C029-5G
Chlortetracycline HCl, EP 5 g CAS number 64-72-2 and purity ≥ 900 pg/mg...
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£46.72 £51.91
Manufacturer: TOKU-E Item Number: C072-100G
Chlortetracycline Hydrochloride 100 g CAS number 64-72-2 and purity ≥900 µg/mg...
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£369.45 £410.50
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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...
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£131.98 £146.64
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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...
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£45.76 £50.84
Manufacturer: TOKU-E Item Number: C086-100G
Choline Chloride 100 g CAS number 67-48-1 and purity >98%...
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£41.90 £46.56
Manufacturer: TOKU-E Item Number: C086-25G
Choline Chloride 25 g CAS number 67-48-1 and purity >98%...
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£29.86 £33.18
Manufacturer: TOKU-E Item Number: C294-10ML
Choramphenicol ReadyMade™ Aqueous Solution 10 ml CAS number 56-75-7 and purity 97.0%-103.0%...
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£44.79 £49.77
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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...
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£226.39 £251.54
Manufacturer: TOKU-E Item Number: C174-5MG
Chromomycin A2 5 mg CAS number 6992-70-7 and purity >95% by HPLC...
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£788.99 £876.66
Manufacturer: TOKU-E Item Number: C152-1MG
Chromomycin A3 1 mg CAS number 7059-24-7 and purity >95% by HPLC...
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£78.03 £86.70
Manufacturer: TOKU-E Item Number: C152-5MG
Chromomycin A3 5 mg CAS number 7059-24-7 and purity >95% by HPLC...
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£272.15 £302.39
Manufacturer: TOKU-E Item Number: C153-0.5MG
Chrysomycin A 0.5 mg CAS number 82196-88-1 and purity >95% by HPLC...
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£255.77 £284.19
Manufacturer: TOKU-E Item Number: C153-2.5MG
Chrysomycin A 2.5 mg CAS number 82196-88-1 and purity >95% by HPLC...
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£894.00 £993.33
Manufacturer: TOKU-E Item Number: C154-0.5MG
Chrysomycin B 0.5 mg CAS number 83852-56-6 and purity >95% by HPLC...
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£255.77 £284.19
Manufacturer: TOKU-E Item Number: C154-2.5MG
Chrysomycin B 2.5 mg CAS number 83852-56-6 and purity >95% by HPLC...
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£894.00 £993.33
Manufacturer: TOKU-E Item Number: C202-10MG
Cidofovir dihydrate 10 mg CAS number 149394-66-1 and purity ≥ 99.0% (HPLC)...
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£67.91 £75.46
Manufacturer: TOKU-E Item Number: C202-50MG
Cidofovir dihydrate 50 mg CAS number 149394-66-1 and purity ≥ 99.0% (HPLC)...
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£246.14 £273.49
Manufacturer: TOKU-E Item Number: C279-1G
Cilastatin Sodium 1 g CAS number 81129-83-1 and purity 98.0-101.5%...
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£345.37 £383.74
Manufacturer: TOKU-E Item Number: C279-100MG
Cilastatin Sodium 100 mg CAS number 81129-83-1 and purity 98.0-101.5%...
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£116.57 £129.52
Manufacturer: TOKU-E Item Number: C242-10MG
Cinacalcet Hydrochloride 10 mg CAS number 364782-34-3 and purity 98%-102%...
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£63.59 £70.65
Manufacturer: TOKU-E Item Number: C242-100MG
Cinacalcet Hydrochloride 100 mg CAS number 364782-34-3 and purity 98%-102%...
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£518.29 £575.88
Manufacturer: TOKU-E Item Number: C268-0.1MG
Cinnabarinic acid 0.1 mg CAS number 606-59-7 and purity >99% by HPLC...
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£146.92 £163.24
Manufacturer: TOKU-E Item Number: C268-0.5MG
Cinnabarinic acid 0.5 mg CAS number 606-59-7 and purity >99% by HPLC...
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£512.03 £568.92
Manufacturer: TOKU-E Item Number: C175-1MG
Cinnamycin 1 mg CAS number 110655-58-8 and purity >95% by HPLC...
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£226.39 £251.54
Manufacturer: TOKU-E Item Number: C175-5MG
Cinnamycin 5 mg CAS number 110655-58-8 and purity >95% by HPLC...
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£788.99 £876.66
Manufacturer: TOKU-E Item Number: C031-25G
Ciprofloxacin 25 g CAS number 85721-33-1 and purity 98.0% - 102.0%...
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£152.21 £169.12
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