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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: E086-5MG
Epoxysuberosin, (+)- 5 mg CAS number 80368-68-9 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£633.41 £703.79
Manufacturer: TOKU-E Item Number: E050-25MG
Eprinomectin 25 mg CAS number 123997-26-2 and purity >95% by HPLC...
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£401.24 £445.82
Manufacturer: TOKU-E Item Number: E050-5MG
Eprinomectin 5 mg CAS number 123997-26-2 and purity >95% by HPLC...
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£114.64 £127.38
Manufacturer: TOKU-E Item Number: E051-1MG
Eprinomectin B1a 1 mg CAS number 133305-88-1 and purity >95% by HPLC...
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£263.96 £293.29
Manufacturer: TOKU-E Item Number: E051-5MG
Eprinomectin B1a 5 mg CAS number 133305-88-1 and purity >95% by HPLC...
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£921.45 £1,023.84
Manufacturer: TOKU-E Item Number: E052-0.5MG
Eprinomectin B1b EvoPure® 0.5 mg CAS number 133305-89-2 and purity >99.0%...
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£300.09 £333.43
Manufacturer: TOKU-E Item Number: E052-2.5MG
Eprinomectin B1b EvoPure® 2.5 mg CAS number 133305-89-2 and purity >99.0%...
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£1,048.14 £1,164.60
Manufacturer: TOKU-E Item Number: E053-1MG
Equisetin 1 mg CAS number 57749-43-6 and purity >99% by HPLC...
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£148.36 £164.84
Manufacturer: TOKU-E Item Number: E053-5MG
Equisetin 5 mg CAS number 57749-43-6 and purity >99% by HPLC...
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£518.77 £576.41
Manufacturer: TOKU-E Item Number: E017-1G
Erlotinib hydrochloride 1 g CAS number 183319-69-9 and purity 98.0-101.0%...
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£377.64 £419.60
Manufacturer: TOKU-E Item Number: E017-100MG
Erlotinib hydrochloride 100 mg CAS number 183319-69-9 and purity 98.0-101.0%...
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£113.68 £126.31
Manufacturer: TOKU-E Item Number: E094-10MG
Ertapenem Sodium 10 mg CAS number 153773-82-1 and purity 95.0% - 102.0% (HPLC)...
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£76.11 £84.56
Manufacturer: TOKU-E Item Number: E094-2x50MG
Ertapenem Sodium 2 x 50 mg CAS number 153773-82-1 and purity 95.0% - 102.0% (HPLC)...
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£317.43 £352.70
Manufacturer: TOKU-E Item Number: E094-50MG
Ertapenem Sodium 50 mg CAS number 153773-82-1 and purity 95.0% - 102.0% (HPLC)...
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£181.11 £201.24
Manufacturer: TOKU-E Item Number: E008-50MG
Ertapenem sodium EvoPure® 50 mg CAS number 153773-82-1 and purity >98% by HPLC...
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£270.70 £300.78
Manufacturer: TOKU-E Item Number: E002-100G
Erythromycin 100 g CAS number 114-07-8 and purity (On Dried Basis): 85-100.5%...
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£754.79 £838.66
Manufacturer: TOKU-E Item Number: E091-25MG
Erythromycin 2'-propionate 25 mg CAS number 134-36-1 and purity ≥95% (HPLC)...
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£179.19 £199.09
Manufacturer: TOKU-E Item Number: E091-5MG
Erythromycin 2'-propionate 5 mg CAS number 134-36-1 and purity ≥95% (HPLC)...
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£51.54 £57.27
Manufacturer: TOKU-E Item Number: E002-25G
Erythromycin 25 g CAS number 114-07-8 and purity (On Dried Basis): 85-100.5%...
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£240.84 £267.60
Manufacturer: TOKU-E Item Number: E002-5G
Erythromycin 5 g CAS number 114-07-8 and purity (On Dried Basis): 85-100.5%...
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£60.69 £67.44
Manufacturer: TOKU-E Item Number: E025-10MG
Erythromycin A enol ether EvoPure® 10 mg CAS number 33396-29-1 and purity >95% by HPLC...
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£287.56 £319.51
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Manufacturer: TOKU-E Item Number: E027-10MG
Erythromycin A EvoPure® 10 mg CAS number 59319-72-1 and purity >95% by HPLC...
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£244.69 £271.88
Manufacturer: TOKU-E Item Number: E054-25MG
Erythromycin A N-oxide 25 mg CAS number 992-65-4 and purity >98% by HPLC...
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£318.39 £353.77
Manufacturer: TOKU-E Item Number: E054-5MG
Erythromycin A N-oxide 5 mg CAS number 992-65-4 and purity >98% by HPLC...
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£91.52 £101.69
Manufacturer: TOKU-E Item Number: E055-25MG
Erythromycin A oxime 25 mg CAS number 111321-02-9 and purity >98% by HPLC...
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£318.39 £353.77
Manufacturer: TOKU-E Item Number: E055-5MG
Erythromycin A oxime 5 mg CAS number 111321-02-9 and purity >98% by HPLC...
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£91.52 £101.69
Manufacturer: TOKU-E Item Number: E021-10MG
Erythromycin B EvoPure® 10 mg CAS number 527-75-3 and purity >95% by HPLC...
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£180.15 £200.16
Manufacturer: TOKU-E Item Number: E056-1MG
Erythromycin C 1 mg CAS number 1675-02-1 and purity >98% by HPLC...
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£114.64 £127.38
Manufacturer: TOKU-E Item Number: E056-5MG
Erythromycin C 5 mg CAS number 1675-02-1 and purity >98% by HPLC...
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£401.24 £445.82
Manufacturer: TOKU-E Item Number: E003-5G
Erythromycin Estolate 5 g CAS number 3521-62-8 and purity (On Dried Basis): ≥ 610 u/mg ...
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£126.20 £140.22
Manufacturer: TOKU-E Item Number: E004-25G
Erythromycin Ethylsuccinate 25 g CAS number 1264-62-6 and purity (On Dried Basis): ≥ 600 µg/mg...
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£231.21 £256.90
Manufacturer: TOKU-E Item Number: D027-5MG
Erythromycin impurity B EvoPure® 5 mg CAS number 992-62-1 and purity >95% by HPLC...
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£279.37 £310.42
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Manufacturer: TOKU-E Item Number: E096-10ML
Erythromycin ReadyMadeTM Solution 10 mL CAS number 114-07-8 and purity (On Dried Basis): 85-100.5%...
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£72.25 £80.28
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Manufacturer: TOKU-E Item Number: E079-100G
Erythromycin Thiocyanate 100g CAS number 7704-67-10 and purity not reported...
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£370.41 £411.57
Manufacturer: TOKU-E Item Number: E079-25G
Erythromycin Thiocyanate 25g CAS number 7704-67-9 and purity not reported...
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£179.19 £199.09
Manufacturer: TOKU-E Item Number: E079-5G
Erythromycin Thiocyanate 5g CAS number 7704-67-8 and purity not reported...
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£100.67 £111.86
Manufacturer: TOKU-E Item Number: E057-1MG
Erythromycylamine 1 mg CAS number 26116-56-3 and purity >98% by HPLC...
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£121.38 £134.87
Manufacturer: TOKU-E Item Number: E057-5MG
Erythromycylamine 5 mg CAS number 26116-56-3 and purity >98% by HPLC...
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£420.51 £467.23
Manufacturer: TOKU-E Item Number: E045-1G
Etamsylate 1g CAS number 2624-44-4 and purity 99.0 - 101.0 %...
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£125.24 £139.15
Manufacturer: TOKU-E Item Number: E045-5G
Etamsylate 5g CAS number 2624-44-4 and purity 99.0 - 101.0 %...
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£475.42 £528.24
Manufacturer: TOKU-E Item Number: E009-25G
Ethambutol 25 g CAS number 74-55-5 and purity (On Dried Basis): 98.5-101.0%...
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£227.35 £252.61
Manufacturer: TOKU-E Item Number: E005-100G
Ethambutol dihydrochloride 100 g CAS number 1070-11-7 and purity (On Dried Basis): 98.0-100.5%...
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£528.88 £587.65
Manufacturer: TOKU-E Item Number: E005-25G
Ethambutol dihydrochloride 25 g CAS number 1070-11-7 and purity (On Dried Basis): 98.0-100.5%...
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£152.69 £169.66
Manufacturer: TOKU-E Item Number: E010-100G
Ethionamide 100 g CAS number 536-33-4 and purity (On Dried Basis): 98.5-101.0%...
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£857.87 £953.19
Manufacturer: TOKU-E Item Number: E010-25G
Ethionamide 25 g CAS number 536-33-4 and purity (On Dried Basis): 98.5-101.0%...
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£410.39 £455.99
Manufacturer: TOKU-E Item Number: E010-5G
Ethionamide 5 g CAS number 536-33-4 and purity (On Dried Basis): 98.5-101.0%...
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£93.45 £103.83
Manufacturer: TOKU-E Item Number: E092-1MG
Ethyl Mycophenolate 1 mg CAS number 32483-51-5 and purity ≥95% (HPLC)...
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£181.11 £201.24
Manufacturer: TOKU-E Item Number: E092-5MG
Ethyl Mycophenolate 5 mg CAS number 32483-51-5 and purity ≥95% (HPLC)...
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£633.41 £703.79
Manufacturer: TOKU-E Item Number: E066-100MG
Etoposide 100 mg CAS number 33419-42-0 and purity ≥ 99.0%...
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£158.95 £176.62
Manufacturer: TOKU-E Item Number: E066-25MG
Etoposide 25 mg CAS number 33419-42-0 and purity ≥ 99.0%...
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£61.66 £68.51
Manufacturer: TOKU-E Item Number: E085-1MG
Euphol acetate 1 mg CAS number 13879-04-4 and purity ≥95% (HPLC)...
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£161.84 £179.83
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