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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.

Epi-ivermectin B1a 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E060-5MG
Epi-ivermectin B1a 5 mg CAS number nan and purity >95.0%...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
epi-Ivermectin B1a 5 mg
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Manufacturer: TOKU-E Item Number: I041-5MG
epi-Ivermectin B1a 5 mg CAS number nan and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£912.78 £1,014.20
Epicoccamide 1 mg
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Manufacturer: TOKU-E Item Number: E077-1MG
Epicoccamide 1 mg CAS number 606139-26-8 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£226.39 £251.54
Epicoccamide 5 mg
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Manufacturer: TOKU-E Item Number: E077-5MG
Epicoccamide 5 mg CAS number 606139-26-8 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£788.99 £876.66
Epiequisetin 1 mg
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Manufacturer: TOKU-E Item Number: E044-1MG
Epiequisetin 1 mg CAS number 255377-45-8 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
Epiequisetin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E044-5MG
Epiequisetin 5 mg CAS number 255377-45-8 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
Epigallocatechin gallate 100 mg
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Manufacturer: TOKU-E Item Number: E065-100MG
Epigallocatechin gallate 100 mg CAS number 989-51-5  and purity ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£129.09 £143.43
Epigallocatechin gallate 50 mg
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Manufacturer: TOKU-E Item Number: E065-50MG
Epigallocatechin gallate 50 mg CAS number 989-51-5  and purity ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£70.80 £78.67
Epirubicin hydrochloride 1 mg
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Manufacturer: TOKU-E Item Number: E090-1MG
Epirubicin hydrochloride 1 mg CAS number 56420-45-2 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£157.03 £174.48
Epirubicin hydrochloride 5 mg
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Manufacturer: TOKU-E Item Number: E090-5MG
Epirubicin hydrochloride 5 mg CAS number 56420-45-2 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£545.74 £606.38
Epothilone A 0.1 mg
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Manufacturer: TOKU-E Item Number: E046-0.1MG
Epothilone A 0.1 mg CAS number 152044-53-6 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
Epothilone A 0.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E046-0.5MG
Epothilone A 0.5 mg CAS number 152044-53-6 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
Epothilone B 0.1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E047-0.1MG
Epothilone B 0.1 mg CAS number 152044-54-7 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
Epothilone B 0.5 mg
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Manufacturer: TOKU-E Item Number: E047-0.5MG
Epothilone B 0.5 mg CAS number 152044-54-7 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
Epoxysuberosin, (+)- 1 mg
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Manufacturer: TOKU-E Item Number: E086-1MG
Epoxysuberosin, (+)- 1 mg CAS number 80368-68-9 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£175.82 £195.35
Epoxysuberosin, (+)- 5 mg
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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%
£614.63 £682.92
Eprinomectin 25 mg
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Manufacturer: TOKU-E Item Number: E050-25MG
Eprinomectin 25 mg CAS number 123997-26-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£389.20 £432.44
Eprinomectin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E050-5MG
Eprinomectin 5 mg CAS number 123997-26-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£111.27 £123.63
Eprinomectin B1a 1 mg
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Manufacturer: TOKU-E Item Number: E051-1MG
Eprinomectin B1a 1 mg CAS number 133305-88-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
Eprinomectin B1a 5 mg
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Manufacturer: TOKU-E Item Number: E051-5MG
Eprinomectin B1a 5 mg CAS number 133305-88-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
Eprinomectin B1b EvoPure® 0.5 mg
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Manufacturer: TOKU-E Item Number: E052-0.5MG
Eprinomectin B1b EvoPure® 0.5 mg CAS number 133305-89-2 and purity >99.0%...
Price excludes taxes and shipping charges. Save -10%
£290.93 £323.26
Eprinomectin B1b EvoPure® 2.5 mg
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Manufacturer: TOKU-E Item Number: E052-2.5MG
Eprinomectin B1b EvoPure® 2.5 mg CAS number 133305-89-2 and purity >99.0%...
Price excludes taxes and shipping charges. Save -10%
£1,017.31 £1,130.34
Equisetin 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E053-1MG
Equisetin 1 mg CAS number 57749-43-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£144.02 £160.02
Equisetin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E053-5MG
Equisetin 5 mg CAS number 57749-43-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£503.35 £559.28
Erlotinib hydrochloride 1 g
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Manufacturer: TOKU-E Item Number: E017-1G
Erlotinib hydrochloride 1 g CAS number 183319-69-9 and purity 98.0-101.0%...
Price excludes taxes and shipping charges. Save -10%
£366.56 £407.29
Erlotinib hydrochloride 100 mg
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Manufacturer: TOKU-E Item Number: E017-100MG
Erlotinib hydrochloride 100 mg CAS number 183319-69-9 and purity 98.0-101.0%...
Price excludes taxes and shipping charges. Save -10%
£110.30 £122.56
Ertapenem Sodium 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E094-10MG
Ertapenem Sodium 10 mg CAS number 153773-82-1 and purity 95.0% - 102.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£73.70 £81.89
Ertapenem Sodium 2 x 50 mg
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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)...
Price excludes taxes and shipping charges. Save -10%
£307.79 £341.99
Ertapenem Sodium 50 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E094-50MG
Ertapenem Sodium 50 mg CAS number 153773-82-1 and purity 95.0% - 102.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£175.82 £195.35
Ertapenem sodium EvoPure® 50 mg
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Manufacturer: TOKU-E Item Number: E008-50MG
Ertapenem sodium EvoPure® 50 mg CAS number 153773-82-1 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£262.51 £291.68
Erythromycin 100 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E002-100G
Erythromycin 100 g CAS number 114-07-8 and purity (On Dried Basis): 85-100.5%...
Price excludes taxes and shipping charges. Save -10%
£732.64 £814.04
Erythromycin 2'-propionate 25 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E091-25MG
Erythromycin 2'-propionate 25 mg CAS number 134-36-1 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£173.89 £193.21
Erythromycin 2'-propionate 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E091-5MG
Erythromycin 2'-propionate 5 mg CAS number 134-36-1 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£49.62 £55.13
Erythromycin 25 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E002-25G
Erythromycin 25 g CAS number 114-07-8 and purity (On Dried Basis): 85-100.5%...
Price excludes taxes and shipping charges. Save -10%
£233.61 £259.57
Erythromycin 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E002-5G
Erythromycin 5 g CAS number 114-07-8 and purity (On Dried Basis): 85-100.5%...
Price excludes taxes and shipping charges. Save -10%
£58.76 £65.29
Erythromycin A enol ether EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: E025-10MG
Erythromycin A enol ether EvoPure® 10 mg CAS number 33396-29-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£278.89 £309.88
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Erythromycin A EvoPure® 10 mg
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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...
Price excludes taxes and shipping charges. Save -10%
£237.47 £263.85
Erythromycin A N-oxide 25 mg
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Manufacturer: TOKU-E Item Number: E054-25MG
Erythromycin A N-oxide 25 mg CAS number 992-65-4 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£308.75 £343.06
Erythromycin A N-oxide 5 mg
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Manufacturer: TOKU-E Item Number: E054-5MG
Erythromycin A N-oxide 5 mg CAS number 992-65-4 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£88.63 £98.48
Erythromycin A oxime 25 mg
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Manufacturer: TOKU-E Item Number: E055-25MG
Erythromycin A oxime 25 mg CAS number 111321-02-9 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£308.75 £343.06
Erythromycin A oxime 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E055-5MG
Erythromycin A oxime 5 mg CAS number 111321-02-9 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£88.63 £98.48
Erythromycin B EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: E021-10MG
Erythromycin B EvoPure® 10 mg CAS number 527-75-3 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£174.85 £194.28
Erythromycin C 1 mg
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Manufacturer: TOKU-E Item Number: E056-1MG
Erythromycin C 1 mg CAS number 1675-02-1 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£111.27 £123.63
Erythromycin C 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E056-5MG
Erythromycin C 5 mg CAS number 1675-02-1 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£389.20 £432.44
Erythromycin Estolate 5 g
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Manufacturer: TOKU-E Item Number: E003-5G
Erythromycin Estolate 5 g CAS number 3521-62-8 and purity (On Dried Basis): ≥ 610 u/mg ...
Price excludes taxes and shipping charges. Save -10%
£122.35 £135.94
Erythromycin Ethylsuccinate 25 g
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Manufacturer: TOKU-E Item Number: E004-25G
Erythromycin Ethylsuccinate 25 g CAS number 1264-62-6 and purity (On Dried Basis): ≥ 600 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£224.46 £249.40
Erythromycin impurity B EvoPure® 5 mg
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Manufacturer: TOKU-E Item Number: D027-5MG
Erythromycin impurity B EvoPure® 5 mg CAS number 992-62-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£271.19 £301.32
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Erythromycin ReadyMadeTM Solution 10 mL
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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%...
Price excludes taxes and shipping charges. Save -10%
£69.84 £77.60
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Erythromycin Thiocyanate 100g
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Manufacturer: TOKU-E Item Number: E079-100G
Erythromycin Thiocyanate 100g CAS number 7704-67-10 and purity not reported...
Price excludes taxes and shipping charges. Save -10%
£359.33 £399.26
Erythromycin Thiocyanate 25g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E079-25G
Erythromycin Thiocyanate 25g CAS number 7704-67-9 and purity not reported...
Price excludes taxes and shipping charges. Save -10%
£173.89 £193.21
Erythromycin Thiocyanate 5g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E079-5G
Erythromycin Thiocyanate 5g CAS number 7704-67-8 and purity not reported...
Price excludes taxes and shipping charges. Save -10%
£97.30 £108.11
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