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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.

Ciprofloxacin 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C031-5G
Ciprofloxacin 5 g CAS number 85721-33-1 and purity 98.0% - 102.0%...
Price excludes taxes and shipping charges. Save -10%
£40.94 £45.49
Ciprofloxacin Hydrochloride 25 g
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Manufacturer: TOKU-E Item Number: C032-25G
Ciprofloxacin Hydrochloride 25 g CAS number 86393-32-0 and purity (On Dried Basis): 98.0-102.0% ...
Price excludes taxes and shipping charges. Save -10%
£177.74 £197.49
Ciprofloxacin Hydrochloride 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C032-5G
Ciprofloxacin Hydrochloride 5 g CAS number 86393-32-0 and purity (On Dried Basis): 98.0-102.0% ...
Price excludes taxes and shipping charges. Save -10%
£42.87 £47.63
Circumdatin A 0.25 mg
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Manufacturer: TOKU-E Item Number: C269-0.25MG
Circumdatin A 0.25 mg CAS number 223130-52-7 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£146.92 £163.24
Circumdatin A 1 mg
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Manufacturer: TOKU-E Item Number: C269-1MG
Circumdatin A 1 mg CAS number 223130-52-7 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£512.03 £568.92
Cisplatin 100 mg
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Manufacturer: TOKU-E Item Number: C203-100MG
Cisplatin 100 mg CAS number 15663-27-1 and purity ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£92.48 £102.76
Cisplatin 500 mg
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Manufacturer: TOKU-E Item Number: C203-500MG
Cisplatin 500 mg CAS number 15663-27-1 and purity ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£244.22 £271.35
Citreoviridin 1 mg
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Manufacturer: TOKU-E Item Number: C176-1MG
Citreoviridin 1 mg CAS number 25425-12-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£83.81 £93.12
Citreoviridin 5 mg
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Manufacturer: TOKU-E Item Number: C176-5MG
Citreoviridin 5 mg CAS number 25425-12-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£289.97 £322.19
Citrinin 1 mg
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Manufacturer: TOKU-E Item Number: C177-1MG
Citrinin 1 mg CAS number 518-75-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£83.81 £93.12
Citrinin 5 mg
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Manufacturer: TOKU-E Item Number: C177-5MG
Citrinin 5 mg CAS number 518-75-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£289.97 £322.19
Citromycetin 1 mg
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Manufacturer: TOKU-E Item Number: C178-1MG
Citromycetin 1 mg CAS number 478-60-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£267.34 £297.04
Citromycetin 5 mg
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Manufacturer: TOKU-E Item Number: C178-5MG
Citromycetin 5 mg CAS number 478-60-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£931.09 £1,034.54
Clarithromycin ReadyMade Solution 1 mL
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Manufacturer: TOKU-E Item Number: C288-1ML
Clarithromycin ReadyMade Solution 1 mL CAS number 81103-11-9 and purity 96.0-102.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£96.34 £107.04
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Clarithromycin ReadyMade Solution 10 x 1 mL
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Manufacturer: TOKU-E Item Number: C288-10x1ML
Clarithromycin ReadyMade Solution 10 x 1 mL CAS number 81103-11-9 and purity 96.0-102.0% (HPLC)...
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£600.65 £667.39
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Clarithromycin related compound C EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: C128-10MG
Clarithromycin related compound C EvoPure® 10 mg CAS number 103450-87-9 and purity ≥98.0% (HPLC as is)...
Price excludes taxes and shipping charges. Save -10%
£355.00 £394.44
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Clarithromycin related compound D EvoPure® 5 mg
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Manufacturer: TOKU-E Item Number: C140-5MG
Clarithromycin related compound D EvoPure® 5 mg CAS number 101666-68-6 and purity >99% by HPLC...
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£329.95 £366.61
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Clarithromycin related compound H EvoPure® 5 mg
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Manufacturer: TOKU-E Item Number: C143-5MG
Clarithromycin related compound H EvoPure® 5 mg CAS number 127140-69-6 and purity >95% by HPLC...
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£479.27 £532.52
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Clarithromycin related compound I EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: C131-10MG
Clarithromycin related compound I EvoPure® 10 mg CAS number 118058-74-5 and purity >95% by HPLC...
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£355.00 £394.44
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Clarithromycin related compound J EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: C132-10MG
Clarithromycin related compound J EvoPure® 10 mg CAS number 13127-18-9 and purity >95% by HPLC...
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£355.00 £394.44
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Clarithromycin related compound K EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: C133-10MG
Clarithromycin related compound K EvoPure® 10 mg CAS number 127157-35-1 and purity >95% by HPLC...
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£355.00 £394.44
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Clarithromycin related compound L EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: C134-10MG
Clarithromycin related compound L EvoPure® 10 mg CAS number 127253-05-8 and purity >99% by HPLC...
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£671.94 £746.60
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Clarithromycin related compound M EvoPure® 5 mg
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Manufacturer: TOKU-E Item Number: C135-5MG
Clarithromycin related compound M EvoPure® 5 mg CAS number 127182-43-8 and purity >95% by HPLC...
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£203.27 £225.85
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Clarithromycin related compound Z EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: E022-10MG
Clarithromycin related compound Z EvoPure® 10 mg CAS number nan and purity ≥99.0% (HPLC as is)...
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£701.81 £779.79
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Clarithromycin USP 1 g
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Manufacturer: TOKU-E Item Number: C033-1G
Clarithromycin USP 1 g CAS number 81103-11-9 and purity (On Dried Basis): 96.0-102.0% ...
Price excludes taxes and shipping charges. Save -10%
£366.56 £407.29
Clarithromycin USP 100 mg
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Manufacturer: TOKU-E Item Number: C033-100MG
Clarithromycin USP 100 mg CAS number 81103-11-9 and purity (On Dried Basis): 96.0-102.0% ...
Price excludes taxes and shipping charges. Save -10%
£73.70 £81.89
Clarithromycin USP 250 mg
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Manufacturer: TOKU-E Item Number: C033-250MG
Clarithromycin USP 250 mg CAS number 81103-11-9 and purity (On Dried Basis): 96.0-102.0% ...
Price excludes taxes and shipping charges. Save -10%
£121.38 £134.87
Clavulanate Lithium 100 mg
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Manufacturer: TOKU-E Item Number: C064-100MG
Clavulanate Lithium 100 mg CAS number 61177-44-4 and purity ≥ 95.0% (by HPLC)...
Price excludes taxes and shipping charges. Save -10%
£146.92 £163.24
Clavulanate Potassium 1 g
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Manufacturer: TOKU-E Item Number: C232-1G
Clavulanate Potassium 1 g CAS number 61177-45-5 and purity 0.98...
Price excludes taxes and shipping charges. Save -10%
£825.60 £917.33
Clavulanate Potassium 100mg
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Manufacturer: TOKU-E Item Number: C232-100MG
Clavulanate Potassium 100mg CAS number 61177-45-5 and purity 0.98...
Price excludes taxes and shipping charges. Save -10%
£110.30 £122.56
Clavulanic Acid Potassium w/ Cellulose (1:1) 1 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C065-1G
Clavulanic Acid Potassium w/ Cellulose (1:1) 1 g CAS number 61177-45-5 and purity 48.0-53.5% (On Dried Basis) (Clavulanic acid potassium)...
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£155.10 £172.33
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Clavulanic Acid Potassium w/ Cellulose (1:1) 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C065-5G
Clavulanic Acid Potassium w/ Cellulose (1:1) 5 g CAS number 61177-45-5 and purity 48.0-53.5% (On Dried Basis) (Clavulanic acid potassium)...
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£513.47 £570.52
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Clindamycin 25mg
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Manufacturer: TOKU-E Item Number: C233-25MG
Clindamycin 25mg CAS number 18323-44-9 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£407.02 £452.24
Clindamycin 5mg
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Manufacturer: TOKU-E Item Number: C233-5MG
Clindamycin 5mg CAS number 18323-44-9 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£117.53 £130.59
Clindamycin Hydrochloride 100 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C035-100MG
Clindamycin Hydrochloride 100 mg CAS number 21462-39-5 and purity ≥ 800 pg/mg...
Price excludes taxes and shipping charges. Save -10%
£225.42 £250.47
Clindamycin Hydrochloride 50 mg
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Manufacturer: TOKU-E Item Number: C035-50MG
Clindamycin Hydrochloride 50 mg CAS number 21462-39-5 and purity ≥ 800 pg/mg...
Price excludes taxes and shipping charges. Save -10%
£126.20 £140.22
Clindamycin Phosphate 100 mg
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Manufacturer: TOKU-E Item Number: C036-100MG
Clindamycin Phosphate 100 mg CAS number 24729-96-2 and purity ≥758 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£212.42 £236.02
Clindamycin Phosphate 50 mg
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Manufacturer: TOKU-E Item Number: C036-50MG
Clindamycin Phosphate 50 mg CAS number 24729-96-2 and purity ≥758 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£116.57 £129.52
Clofazimine 1 g
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Manufacturer: TOKU-E Item Number: C201-1G
Clofazimine 1 g CAS number 2030-63-9 and purity ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£43.83 £48.70
Clofazimine 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C201-5G
Clofazimine 5 g CAS number 2030-63-9 and purity ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£171.96 £191.07
Clotrimazole 25 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C037-25G
Clotrimazole 25 g CAS number 23593-75-1 and purity (On Dried Basis): 98.5-100.5%...
Price excludes taxes and shipping charges. Save -10%
£308.75 £343.06
Clotrimazole 4 x 25 g
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Manufacturer: TOKU-E Item Number: C037-4x25G
Clotrimazole 4 x 25 g CAS number 23593-75-1 and purity (On Dried Basis): 98.5-100.5%...
Price excludes taxes and shipping charges. Save -10%
£788.03 £875.59
Clotrimazole 5 g
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Manufacturer: TOKU-E Item Number: C037-5G
Clotrimazole 5 g CAS number 23593-75-1 and purity (On Dried Basis): 98.5-100.5%...
Price excludes taxes and shipping charges. Save -10%
£84.78 £94.20
Cloxacillin Sodium 1 g
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Manufacturer: TOKU-E Item Number: C038-1G
Cloxacillin Sodium 1 g CAS number 7081-44-9 and purity ≥ 825 pg/mg...
Price excludes taxes and shipping charges. Save -10%
£53.95 £59.94
Cloxacillin Sodium 5 g
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Manufacturer: TOKU-E Item Number: C038-5G
Cloxacillin Sodium 5 g CAS number 7081-44-9 and purity ≥ 825 pg/mg...
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£218.68 £242.98
Co-trimoxazole ReadyMadeâ„¢ Solution 10 x 1 mL
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Manufacturer: TOKU-E Item Number: C287-10x1ML
Co-trimoxazole ReadyMade™ Solution 10 x 1 mL CAS number 8064-90-2 and purity nan...
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£542.85 £603.17
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Cochlioquinone A 0.5 mg
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Manufacturer: TOKU-E Item Number: C179-0.5MG
Cochlioquinone A 0.5 mg CAS number 32450-25-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£238.43 £264.92
Cochlioquinone A 2.5 mg
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Manufacturer: TOKU-E Item Number: C179-2.5MG
Cochlioquinone A 2.5 mg CAS number 32450-25-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£832.82 £925.36
Cochlioquinone B 0.5 mg
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Manufacturer: TOKU-E Item Number: C180-0.5MG
Cochlioquinone B 0.5 mg CAS number 32450-26-3 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£238.43 £264.92
Cochlioquinone B 2.5 mg
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Manufacturer: TOKU-E Item Number: C180-2.5MG
Cochlioquinone B 2.5 mg CAS number 32450-26-3 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£832.82 £925.36
Colchicine 1 g
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Manufacturer: TOKU-E Item Number: C093-1G
Colchicine 1 g CAS number 64-86-8 and purity ≥98.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£98.26 £109.18
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