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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.

Brand: TOKU-E Item Number: Q008-1MG
Quinupristin Mesylate 1 mg CAS number 120138-50-3 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£237.95 £264.39
Brand: TOKU-E Item Number: Q008-5MG
Quinupristin Mesylate 5 mg CAS number 120138-50-3 and purity >98% by HPLC...
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£830.42 £922.68
Brand: TOKU-E Item Number: R020-1MG
Radicicol 1 mg CAS number 12772-57-5 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£129.09 £143.43
Brand: TOKU-E Item Number: R020-5MG
Radicicol 5 mg CAS number 12772-57-5 and purity >99% by HPLC...
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£448.44 £498.27
Brand: TOKU-E Item Number: R047-1MG
Radicinol 1 mg CAS number 65647-66-7 and purity >98% by HPLC...
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£217.24 £241.38
Brand: TOKU-E Item Number: R047-5MG
Radicinol 5 mg CAS number 65647-66-7 and purity >98% by HPLC...
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£755.76 £839.73
Brand: TOKU-E Item Number: R024-10MG
Ramoplanin 10 mg CAS number 76168-82-6 and purity >95% by HPLC...
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£202.79 £225.32
Brand: TOKU-E Item Number: R024-250MG
Ramoplanin 250 mg CAS number 76168-82-6 and purity >95% by HPLC...
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£491.80 £546.44
Brand: TOKU-E Item Number: R001-10MG
Rapamycin 10 mg CAS number 53123-88-9 and purity 98-102% by HPLC...
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£231.21 £256.90
Brand: TOKU-E Item Number: R001-25MG
Rapamycin 25 mg CAS number 53123-88-9 and purity (On Dried Basis): 98.0 – 102.0%...
Price excludes taxes and shipping charges. Save -10%
£290.93 £323.26
Brand: TOKU-E Item Number: R057-10MG
Ravuconazole 10 mg CAS number 182760-06-1 and purity >=99.0%...
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£158.95 £176.62
Brand: TOKU-E Item Number: R057-50MG
Ravuconazole 50 mg CAS number 182760-06-1 and purity >=99.0%...
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£337.66 £375.18
Brand: TOKU-E Item Number: R021-0.5MG
Rebeccamycin 0.5 mg CAS number 93908-02-2 and purity >99% by HPLC...
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£254.33 £282.59
Brand: TOKU-E Item Number: R021-2.5MG
Rebeccamycin 2.5 mg CAS number 93908-02-2 and purity >99% by HPLC...
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£884.85 £983.16
Brand: TOKU-E Item Number: R055-10MG
Relebactam 10 mg CAS number 1174018-99-5 and purity >= 98.0%...
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£143.54 £159.49
Brand: TOKU-E Item Number: R055-50MG
Relebactam 50 mg CAS number 1174018-99-5 and purity >= 98.0%...
Price excludes taxes and shipping charges. Save -10%
£460.00 £511.12
Brand: TOKU-E Item Number: R056-10MG
Relebactam Monohydrate 10 mg CAS number 1174020-13-3 and purity >=99.0%...
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£153.66 £170.73
Brand: TOKU-E Item Number: R056-50MG
Relebactam Monohydrate 50 mg CAS number 1174020-13-3 and purity >=99.0%...
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£470.60 £522.89
Brand: TOKU-E Item Number: R050-10MG
Remdesivir 10mg CAS number 1809249-37-3 and purity 97.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£198.45 £220.50
Brand: TOKU-E Item Number: R050-50MG
Remdesivir 50mg CAS number 1809249-37-3 and purity 97.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£576.57 £640.63
Brand: TOKU-E Item Number: R025-1MG
Resistoflavine 1 mg CAS number 29706-96-5 and purity >98% by HPLC...
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£250.47 £278.30
Brand: TOKU-E Item Number: R025-5MG
Resistoflavine 5 mg CAS number 29706-96-5 and purity >98% by HPLC...
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£875.21 £972.46
Brand: TOKU-E Item Number: R026-1MG
Resistomycin 1 mg CAS number 20004-62-0 and purity >95% by HPLC...
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£129.09 £143.43
Brand: TOKU-E Item Number: R026-5MG
Resistomycin 5 mg CAS number 20004-62-0 and purity >95% by HPLC...
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£448.44 £498.27
Brand: TOKU-E Item Number: R027-25MG
Retapamulin 25 mg CAS number 224452-66-8 and purity ≥99.5%...
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£84.29 £93.66
Brand: TOKU-E Item Number: R028-1MG
Reticulol 1 mg CAS number 224452-66-8 and purity >95% by HPLC...
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£172.44 £191.60
Brand: TOKU-E Item Number: R028-5MG
Reticulol 5 mg CAS number 224452-66-8 and purity >95% by HPLC...
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£597.76 £664.18
Brand: TOKU-E Item Number: R022-0.25MG
Reveromycin A 0.25 mg CAS number 134615-37-5 and purity >99% by HPLC...
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£280.82 £312.02
Brand: TOKU-E Item Number: R022-1MG
Reveromycin A 1 mg CAS number 134615-37-5 and purity >99% by HPLC...
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£978.77 £1,087.53
Brand: TOKU-E Item Number: R029-0.25MG
Reveromycin B 0.25 mg CAS number 144860-68-4 and purity >98% by HPLC...
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£280.82 £312.02
Brand: TOKU-E Item Number: R029-1MG
Reveromycin B 1 mg CAS number 144860-68-4 and purity >98% by HPLC...
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£978.77 £1,087.53
Brand: TOKU-E Item Number: R030-0.25MG
Reveromycin C 0.25 mg CAS number 144860-69-5 and purity >95% by HPLC...
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£280.82 £312.02
Brand: TOKU-E Item Number: R030-1MG
Reveromycin C 1 mg CAS number 144860-69-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£978.77 £1,087.53
Brand: TOKU-E Item Number: R031-0.25MG
Reveromycin D 0.25 mg CAS number 144860-70-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£280.82 £312.02
Brand: TOKU-E Item Number: R031-1MG
Reveromycin D 1 mg CAS number 144860-70-8 and purity >95% by HPLC...
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£978.77 £1,087.53
Brand: TOKU-E Item Number: R018-10MG
Ribavirin 10 mg CAS number 36791-04-5 and purity (On Dried Basis): 98.5-101.6%...
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£40.46 £44.96
Brand: TOKU-E Item Number: R018-100MG
Ribavirin 100 mg CAS number 36791-04-5 and purity (On Dried Basis): 98.5-101.6%...
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£114.64 £127.38
Brand: TOKU-E Item Number: R009-100G
Riboflavin 100 g CAS number 83-88-5 and purity (On Dried Basis): 98.0-102.0%...
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£110.79 £123.10
Brand: TOKU-E Item Number: R009-25G
Riboflavin 25 g CAS number 83-88-5 and purity (On Dried Basis): 98.0-102.0%...
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£34.20 £38.00
Brand: TOKU-E Item Number: R002-1G
Ribostamycin Sulfate 1 g CAS number 53797-35-6 and purity (On Dried Basis): ≥630µg/mg...
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£635.34 £705.93
Brand: TOKU-E Item Number: R002-250MG
Ribostamycin Sulfate 250 mg CAS number 53797-35-6 and purity (On Dried Basis): ≥630µg/mg...
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£291.90 £324.33
Brand: TOKU-E Item Number: R032-1MG
Ridaforolimus 1 mg CAS number 572924-54-0 and purity >95% by HPLC...
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£147.88 £164.31
Brand: TOKU-E Item Number: R032-5MG
Ridaforolimus 5 mg CAS number 572924-54-0 and purity >95% by HPLC...
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£512.51 £569.45
Brand: TOKU-E Item Number: R003-1G
Rifampicin 1 g CAS number 13292-46-1 and purity (On Dried Basis): 97.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£95.37 £105.97
Brand: TOKU-E Item Number: R003-25G
Rifampicin 25 g CAS number 13292-46-1 and purity (On Dried Basis): 97.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£725.89 £806.55
Brand: TOKU-E Item Number: R003-5G
Rifampicin 5 g CAS number 13292-46-1 and purity (On Dried Basis): 97.0-102.0%...
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£330.43 £367.15
Brand: TOKU-E Item Number: R040-1G
Rifampicin Sodium 1 g CAS number 38776-75-9 and purity ≥ 900 IU/mg...
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£123.31 £137.01
Brand: TOKU-E Item Number: R040-5G
Rifampicin Sodium 5 g CAS number 38776-75-9 and purity ≥ 900 IU/mg...
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£429.66 £477.40
Brand: TOKU-E Item Number: R041-100ML
Rifampicin Solution (10mg/mL in water) sterile filtered 100 mL CAS number 13292-46-1 and purity not reported...
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£188.82 £209.80
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Brand: TOKU-E Item Number: R041-20ML
Rifampicin Solution (10mg/mL in water) sterile filtered 20 mL CAS number 13292-46-1 and purity nan...
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£71.29 £79.21
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Brand: TOKU-E Item Number: R019-10MG
Ristocetin A Sulfate 10 mg CAS number 11140-99-1 and purity >95% by HPLC...
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£280.82 £312.02
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