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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.

Econazole nitrate 25 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E001-25G
Econazole nitrate 25 g CAS number 68797-31-9 and purity (On Dried Basis): 98.5-101.0%...
Price excludes taxes and shipping charges. Save -10%
£232.65 £258.50
Econazole nitrate 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E001-5G
Econazole nitrate 5 g CAS number 68797-31-9 and purity (On Dried Basis): 98.5-101.0%...
Price excludes taxes and shipping charges. Save -10%
£64.55 £71.72
Efinaconazole 100 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E097-100MG
Efinaconazole 100 mg CAS number 164650-44-6 and purity ≥ 99.0%...
Price excludes taxes and shipping charges. Save -10%
£292.86 £325.40
Elaiophylin 1 mg
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Manufacturer: TOKU-E Item Number: E032-1MG
Elaiophylin 1 mg CAS number 37318-06-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£144.02 £160.02
Elaiophylin 5 mg
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Manufacturer: TOKU-E Item Number: E032-5MG
Elaiophylin 5 mg CAS number 37318-06-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£503.35 £559.28
Emamectin B1a 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E033-1MG
Emamectin B1a 1 mg CAS number 121124-29-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
Emamectin B1a 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E033-5MG
Emamectin B1a 5 mg CAS number 121124-29-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
Embelin 10 mg
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Manufacturer: TOKU-E Item Number: E063-10MG
Embelin 10 mg CAS number 550-24-3 and purity ≥98%...
Price excludes taxes and shipping charges. Save -10%
£80.44 £89.38
Embelin 50 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E063-50MG
Embelin 50 mg CAS number 550-24-3 and purity ≥98%...
Price excludes taxes and shipping charges. Save -10%
£289.01 £321.12
Emeguisin A 0.1 mg
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Manufacturer: TOKU-E Item Number: E089-0.1MG
Emeguisin A 0.1 mg CAS number 117032-54-9 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£146.92 £163.24
Emeguisin A 0.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E089-0.5MG
Emeguisin A 0.5 mg CAS number 117032-54-9 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£512.03 £568.92
Emestrin 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E087-1MG
Emestrin 1 mg CAS number 97816-62-1 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£205.68 £228.53
Emestrin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E087-5MG
Emestrin 5 mg CAS number 97816-62-1 and purity ≥95% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£719.63 £799.59
Emodepside 100mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E078-100MG
Emodepside 100mg CAS number 71751-41-2 (mixture); 65195-55-3 (b1a); 65195-56-4 (b1b) and purity not reported...
Price excludes taxes and shipping charges. Save -10%
£587.65 £652.94
Emodepside 25mg
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Manufacturer: TOKU-E Item Number: E078-25MG
Emodepside 25mg CAS number 71751-41-2 (mixture); 65195-55-3 (b1a); 65195-56-4 (b1b) and purity not reported...
Price excludes taxes and shipping charges. Save -10%
£305.87 £339.85
Emodin 250 mg
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Manufacturer: TOKU-E Item Number: E064-250MG
Emodin 250 mg CAS number 518-82-1 and purity ≥98%...
Price excludes taxes and shipping charges. Save -10%
£366.56 £407.29
Emodin 50 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E064-50MG
Emodin 50 mg CAS number 518-82-1 and purity ≥98%...
Price excludes taxes and shipping charges. Save -10%
£107.42 £119.35
Enniatin 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E039-10MG
Enniatin 10 mg CAS number 11113-62-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£267.34 £297.04
Enniatin 50 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E039-50MG
Enniatin 50 mg CAS number 11113-62-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£931.09 £1,034.54
Enniatin A 0.5 mg
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Manufacturer: TOKU-E Item Number: E035-0.5MG
Enniatin A 0.5 mg CAS number 2503-13-1 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£173.89 £193.21
Enniatin A 2.5 mg
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Manufacturer: TOKU-E Item Number: E035-2.5MG
Enniatin A 2.5 mg CAS number 2503-13-1 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£604.51 £671.68
Enniatin A1 1 mg
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Manufacturer: TOKU-E Item Number: E036-1MG
Enniatin A1 1 mg CAS number 4530-21-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£181.59 £201.77
Enniatin A1 5 mg
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Manufacturer: TOKU-E Item Number: E036-5MG
Enniatin A1 5 mg CAS number 4530-21-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£632.45 £702.72
Enniatin B 1 mg
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Manufacturer: TOKU-E Item Number: E037-1MG
Enniatin B 1 mg CAS number 917-13-5 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£122.35 £135.94
Enniatin B 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E037-5MG
Enniatin B 5 mg CAS number 917-13-5 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£425.81 £473.12
Enniatin B1 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E038-1MG
Enniatin B1 1 mg CAS number 19914-20-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£181.59 £201.77
Enniatin B1 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E038-5MG
Enniatin B1 5 mg CAS number 19914-20-6 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£636.30 £707.00
Enopeptin A 0.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E040-0.5MG
Enopeptin A 0.5 mg CAS number 139601-96-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
Enopeptin A 2.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E040-2.5MG
Enopeptin A 2.5 mg CAS number 139601-96-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
Enoxacin 1 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E029-1G
Enoxacin 1 g CAS number 84294-96-2 and purity >98.5%...
Price excludes taxes and shipping charges. Save -10%
£73.70 £81.89
Enoxacin 500 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E029-500MG
Enoxacin 500 mg CAS number 84294-96-2 and purity >98.5%...
Price excludes taxes and shipping charges. Save -10%
£45.76 £50.84
Enramycin 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E006-10MG
Enramycin 10 mg CAS number 11115-82-5 and purity ≥ 95.0%...
Price excludes taxes and shipping charges. Save -10%
£192.67 £214.08
Enramycin A EvoPure® 50 mg
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Manufacturer: TOKU-E Item Number: E018-50MG
Enramycin A EvoPure® 50 mg CAS number 34438-27-2 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£199.90 £222.11
Enramycin B EvoPure® 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E019-5MG
Enramycin B EvoPure® 5 mg CAS number 34304-21-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£271.67 £301.85
Enrofloxacin 25 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E016-25G
Enrofloxacin 25 g CAS number 93106-60-6 and purity ≥ 98.5%...
Price excludes taxes and shipping charges. Save -10%
£494.21 £549.12
Enrofloxacin 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E016-5G
Enrofloxacin 5 g CAS number 93106-60-6 and purity ≥ 98.5%...
Price excludes taxes and shipping charges. Save -10%
£122.35 £135.94
Enrofloxacin hydrochloride 1 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E007-1G
Enrofloxacin hydrochloride 1 g CAS number 112732-17-9 and purity ≥ 98.5%...
Price excludes taxes and shipping charges. Save -10%
£802.00 £891.11
Enrofloxacin hydrochloride 100 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E007-100MG
Enrofloxacin hydrochloride 100 mg CAS number 112732-17-9 and purity ≥ 98.5%...
Price excludes taxes and shipping charges. Save -10%
£122.35 £135.94
Enrofloxacin hydrochloride 500 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E007-500MG
Enrofloxacin hydrochloride 500 mg CAS number 112732-17-9 and purity ≥ 98.5%...
Price excludes taxes and shipping charges. Save -10%
£476.38 £529.31
Entecavir 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E030-10MG
Entecavir 10 mg CAS number 209216-23-9 and purity (On Dried Basis): 98.0 - 102.0%...
Price excludes taxes and shipping charges. Save -10%
£61.66 £68.51
Entecavir 25 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E030-25MG
Entecavir 25 mg CAS number 209216-23-9 and purity (On Dried Basis): 98.0 - 102.0%...
Price excludes taxes and shipping charges. Save -10%
£129.09 £143.43
Enterocin 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E041-1MG
Enterocin 1 mg CAS number 59678-46-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£226.39 £251.54
Enterocin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E041-5MG
Enterocin 5 mg CAS number 59678-46-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£788.99 £876.66
epi-Avermectin B1a 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: A152-1MG
epi-Avermectin B1a 1 mg CAS number 106434-14-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£261.55 £290.61
Epi-avermectin B1a 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E043-1MG
Epi-avermectin B1a 1 mg CAS number 106434-14-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£307.79 £341.99
Epi-avermectin B1a 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E043-5MG
Epi-avermectin B1a 5 mg CAS number 106434-14-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£1,076.08 £1,195.64
epi-Avermectin B1a 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: A152-5MG
epi-Avermectin B1a 5 mg CAS number 106434-14-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£912.78 £1,014.20
Epi-doramectin 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: D062-1MG
Epi-doramectin 1 mg CAS number nan and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
Epi-doramectin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: D062-5MG
Epi-doramectin 5 mg CAS number nan and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£894.48 £993.87
Epi-ivermectin B1a 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: E060-1MG
Epi-ivermectin B1a 1 mg CAS number nan and purity >95.0%...
Price excludes taxes and shipping charges. Save -10%
£256.26 £284.73
epi-Ivermectin B1a 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: I041-1MG
epi-Ivermectin B1a 1 mg CAS number nan and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£261.55 £290.61
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