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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.

Omadacycline Tosylate 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O048-10MG
Omadacycline Tosylate 10 mg CAS number 1075240-43-5 and purity 97.0% - 102.0 % (Anhydrous basis)...
Price excludes taxes and shipping charges. Save -10%
£428.70 £476.33
Omeprazole 100 mg
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Manufacturer: TOKU-E Item Number: O011-100MG
Omeprazole 100 mg CAS number 73590-58-6 and purity 98.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£103.56 £115.07
Omeprazole 500 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O011-500MG
Omeprazole 500 mg CAS number 73590-58-6 and purity 98.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£320.80 £356.44
Oosporein 0.1 mg
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Manufacturer: TOKU-E Item Number: O046-0.1MG
Oosporein 0.1 mg CAS number 475-54-7 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£160.40 £178.22
Oosporein 0.5 mg
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Manufacturer: TOKU-E Item Number: O046-0.5MG
Oosporein 0.5 mg CAS number 475-54-7 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£557.31 £619.23
OP-145 1 mg
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Manufacturer: TOKU-E Item Number: O012-1MG
OP-145 1 mg CAS number Not Established and purity ≥98%...
Price excludes taxes and shipping charges. Save -10%
£269.26 £299.18
OP-145 5 mg
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Manufacturer: TOKU-E Item Number: O012-5MG
OP-145 5 mg CAS number Not Established and purity ≥98%...
Price excludes taxes and shipping charges. Save -10%
£610.29 £678.10
Ophiobolin A 1 mg
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Manufacturer: TOKU-E Item Number: O022-1MG
Ophiobolin A 1 mg CAS number 4611-05-6 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£187.37 £208.19
Ophiobolin A 5 mg
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Manufacturer: TOKU-E Item Number: O022-5MG
Ophiobolin A 5 mg CAS number 4611-05-6 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£652.19 £724.66
Ophiobolin B 1 mg
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Manufacturer: TOKU-E Item Number: O023-1MG
Ophiobolin B 1 mg CAS number 5601-74-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Ophiobolin B 5 mg
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Manufacturer: TOKU-E Item Number: O023-5MG
Ophiobolin B 5 mg CAS number 5601-74-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
Ophiobolin C 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O024-1MG
Ophiobolin C 1 mg CAS number 19022-51-6 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Ophiobolin C 5 mg
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Manufacturer: TOKU-E Item Number: O024-5MG
Ophiobolin C 5 mg CAS number 19022-51-6 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
Orfamide A 1 mg
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Manufacturer: TOKU-E Item Number: O025-1MG
Orfamide A 1 mg CAS number 939960-34-6 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£261.55 £290.61
Orfamide A 5 mg
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Manufacturer: TOKU-E Item Number: O025-5MG
Orfamide A 5 mg CAS number 939960-34-6 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£912.78 £1,014.20
Orfamide B 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O026-1MG
Orfamide B 1 mg CAS number 939960-35-7 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£261.55 £290.61
Orfamide B 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O026-5MG
Orfamide B 5 mg CAS number 939960-35-7 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£912.78 £1,014.20
Oritavancin Diphosphate 10 mg
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Manufacturer: TOKU-E Item Number: O032-10MG
Oritavancin Diphosphate 10 mg CAS number 192564-14-0 and purity ≥98% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£144.99 £161.10
Oritavancin Diphosphate 50mg
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Manufacturer: TOKU-E Item Number: O032-50MG
Oritavancin Diphosphate 50mg CAS number 192564-14-0 and purity ≥98% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£587.65 £652.94
Ornidazole 5g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O007-5G
Ornidazole 5g CAS number 16773-42-5 and purity 99.0% ~ 101.0% (dried basis)...
Price excludes taxes and shipping charges. Save -10%
£59.72 £66.36
Orsellinic Acid 25 mg
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Manufacturer: TOKU-E Item Number: O050-25MG
Orsellinic Acid 25 mg CAS number 480-64-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£183.04 £203.38
Orsellinic Acid 5 mg
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Manufacturer: TOKU-E Item Number: O050-5MG
Orsellinic Acid 5 mg CAS number 480-64-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£52.98 £58.87
Oseltamivir Phosphate 1 g
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Manufacturer: TOKU-E Item Number: O041-1G
Oseltamivir Phosphate 1 g CAS number 204255-11-8 and purity (On Dried Basis): ≥98%-101.5%...
Price excludes taxes and shipping charges. Save -10%
£63.59 £70.65
Oseltamivir Phosphate 5 g
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Manufacturer: TOKU-E Item Number: O041-5G
Oseltamivir Phosphate 5 g CAS number 204255-11-8 and purity (On Dried Basis): ≥98%-101.5%...
Price excludes taxes and shipping charges. Save -10%
£156.06 £173.40
Ostreogrycin A 25 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O027-25MG
Ostreogrycin A 25 mg CAS number 21411-53-0 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
Ostreogrycin A 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O027-5MG
Ostreogrycin A 5 mg CAS number 21411-53-0 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Oxacillin sodium 1 g
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Manufacturer: TOKU-E Item Number: O006-1G
Oxacillin sodium 1 g CAS number 7240-38-2 (monohydrate) and purity (On Dried Basis): 815-950µg/mg...
Price excludes taxes and shipping charges. Save -10%
£38.05 £42.28
Oxacillin sodium 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O006-5G
Oxacillin sodium 5 g CAS number 7240-38-2 (monohydrate) and purity (On Dried Basis): 815-950µg/mg...
Price excludes taxes and shipping charges. Save -10%
£104.53 £116.14
Oxantel pamoate 1 g
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Manufacturer: TOKU-E Item Number: O033-1G
Oxantel pamoate 1 g CAS number 68813-55-8 and purity (On Dried Basis): 97-103%...
Price excludes taxes and shipping charges. Save -10%
£20.23 £22.48
Oxantel pamoate 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O033-5G
Oxantel pamoate 5 g CAS number 68813-55-8 and purity (On Dried Basis): 97-103%...
Price excludes taxes and shipping charges. Save -10%
£83.81 £93.12
Oxiracetam 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O040-10MG
Oxiracetam 10 mg CAS number 62613-82-5 and purity ≥99.0 - 101.0% (On Dried Basis)...
Price excludes taxes and shipping charges. Save -10%
£224.46 £249.40
Oxiracetam 100 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O040-100MG
Oxiracetam 100 mg CAS number 62613-82-5 and purity ≥99.0 - 101.0% (On Dried Basis)...
Price excludes taxes and shipping charges. Save -10%
£432.06 £480.07
Oxolinic acid 25 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O002-25G
Oxolinic acid 25 g CAS number 14698-29-4 and purity (As Is): 98.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£395.94 £439.93
Oxolinic acid 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O002-5G
Oxolinic acid 5 g CAS number 14698-29-4 and purity (As Is): 98.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£118.49 £131.66
Oxozeaenol, (5E)-7- 1 mg
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Manufacturer: TOKU-E Item Number: O044-1MG
Oxozeaenol, (5E)-7- 1 mg CAS number 1198574-97-8 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£179.67 £199.63
Oxozeaenol, (5E)-7- 5 mg
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Manufacturer: TOKU-E Item Number: O044-5MG
Oxozeaenol, (5E)-7- 5 mg CAS number 1198574-97-8 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£627.63 £697.37
Oxychloroaphine 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O029-1MG
Oxychloroaphine 1 mg CAS number 550-89-0 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£91.04 £101.15
Oxychloroaphine 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O029-5MG
Oxychloroaphine 5 mg CAS number 550-89-0 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£315.50 £350.56
Oxymatrine 1 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O031-1G
Oxymatrine 1 g CAS number 16837-52-8 and purity (On Dried Basis): ≥98%...
Price excludes taxes and shipping charges. Save -10%
£343.44 £381.60
Oxymatrine 100 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O031-100MG
Oxymatrine 100 mg CAS number 16837-52-8 and purity (On Dried Basis): ≥98%...
Price excludes taxes and shipping charges. Save -10%
£118.49 £131.66
Oxymatrine 500 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O031-500MG
Oxymatrine 500 mg CAS number 16837-52-8 and purity (On Dried Basis): ≥98%...
Price excludes taxes and shipping charges. Save -10%
£195.56 £217.29
Oxysophocarpine 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O034-10MG
Oxysophocarpine 10 mg CAS number 26904-64-3 and purity ≥98%...
Price excludes taxes and shipping charges. Save -10%
£434.96 £483.29
Oxytetracycline Dihydrate 10 g
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Manufacturer: TOKU-E Item Number: O003-10G
Oxytetracycline Dihydrate 10 g CAS number 6153-64-6 and purity (On Dried Basis): ≥832 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£54.91 £61.01
Oxytetracycline Dihydrate 50 g
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Manufacturer: TOKU-E Item Number: O003-50G
Oxytetracycline Dihydrate 50 g CAS number 6153-64-6 and purity (On Dried Basis): ≥832 µg/mg...
Price excludes taxes and shipping charges. Save -10%
£265.41 £294.90
Oxytetracycline Hydrochloride 10 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O004-10G
Oxytetracycline Hydrochloride 10 g CAS number 2058-46-0 and purity (On Dried Basis): ≥835µg/mg...
Price excludes taxes and shipping charges. Save -10%
£46.72 £51.91
Oxytetracycline Hydrochloride 100 g
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Manufacturer: TOKU-E Item Number: O004-100G
Oxytetracycline Hydrochloride 100 g CAS number 2058-46-0 and purity (On Dried Basis): ≥835µg/mg...
Price excludes taxes and shipping charges. Save -10%
£184.01 £204.45
Oxytetracycline Hydrochloride 50 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O004-50G
Oxytetracycline Hydrochloride 50 g CAS number 2058-46-0 and purity (On Dried Basis): ≥835µg/mg...
Price excludes taxes and shipping charges. Save -10%
£109.34 £121.49
Oxytetracycline ReadyMade Solution 10 x 1 mL
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Manufacturer: TOKU-E Item Number: O049-10x1ML
Oxytetracycline ReadyMade Solution 10 x 1 mL CAS number 2058-46-0 and purity (On Dried Basis): ≥835µg/mg...
Price excludes taxes and shipping charges. Save -10%
£117.53 £130.59
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Ozenoxacin 100 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: O051-100MG
Ozenoxacin 100 mg CAS number 245765-41-7 and purity >=99.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£154.13 £171.26
p-Chlorophenoxyacetic Acid 100 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C116-100G
p-Chlorophenoxyacetic Acid 100 g CAS number 122-88-3 and purity nan...
Price excludes taxes and shipping charges. Save -10%
£68.88 £76.53
p-Chlorophenoxyacetic Acid 25 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: C116-25G
p-Chlorophenoxyacetic Acid 25 g CAS number 122-88-3 and purity nan...
Price excludes taxes and shipping charges. Save -10%
£27.94 £31.04
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