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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.

Resistoflavine 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R025-1MG
Resistoflavine 1 mg CAS number 29706-96-5 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£242.77 £269.74
Resistoflavine 5 mg
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Manufacturer: TOKU-E Item Number: R025-5MG
Resistoflavine 5 mg CAS number 29706-96-5 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£849.68 £944.09
Resistomycin 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R026-1MG
Resistomycin 1 mg CAS number 20004-62-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£125.24 £139.15
Resistomycin 5 mg
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Manufacturer: TOKU-E Item Number: R026-5MG
Resistomycin 5 mg CAS number 20004-62-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£434.96 £483.29
Retapamulin 25 mg
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Manufacturer: TOKU-E Item Number: R027-25MG
Retapamulin 25 mg CAS number 224452-66-8 and purity ≥99.5%...
Price excludes taxes and shipping charges. Save -10%
£81.41 £90.45
Reticulol 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R028-1MG
Reticulol 1 mg CAS number 224452-66-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£167.14 £185.71
Reticulol 5 mg
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Manufacturer: TOKU-E Item Number: R028-5MG
Reticulol 5 mg CAS number 224452-66-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£579.94 £644.38
Reveromycin A 0.25 mg
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Manufacturer: TOKU-E Item Number: R022-0.25MG
Reveromycin A 0.25 mg CAS number 134615-37-5 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Reveromycin A 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R022-1MG
Reveromycin A 1 mg CAS number 134615-37-5 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
Reveromycin B 0.25 mg
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Manufacturer: TOKU-E Item Number: R029-0.25MG
Reveromycin B 0.25 mg CAS number 144860-68-4 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Reveromycin B 1 mg
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Manufacturer: TOKU-E Item Number: R029-1MG
Reveromycin B 1 mg CAS number 144860-68-4 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
Reveromycin C 0.25 mg
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Manufacturer: TOKU-E Item Number: R030-0.25MG
Reveromycin C 0.25 mg CAS number 144860-69-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Reveromycin C 1 mg
Actual product may differ from image
Manufacturer: 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%
£949.87 £1,055.41
Reveromycin D 0.25 mg
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Manufacturer: 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%
£272.63 £302.92
Reveromycin D 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R031-1MG
Reveromycin D 1 mg CAS number 144860-70-8 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
Ribavirin 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R018-10MG
Ribavirin 10 mg CAS number 36791-04-5 and purity (On Dried Basis): 98.5-101.6%...
Price excludes taxes and shipping charges. Save -10%
£39.02 £43.35
Ribavirin 100 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R018-100MG
Ribavirin 100 mg CAS number 36791-04-5 and purity (On Dried Basis): 98.5-101.6%...
Price excludes taxes and shipping charges. Save -10%
£111.27 £123.63
Riboflavin 100 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R009-100G
Riboflavin 100 g CAS number 83-88-5 and purity (On Dried Basis): 98.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£107.42 £119.35
Riboflavin 25 g
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Manufacturer: TOKU-E Item Number: R009-25G
Riboflavin 25 g CAS number 83-88-5 and purity (On Dried Basis): 98.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£32.75 £36.39
Ribostamycin Sulfate 1 g
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Manufacturer: TOKU-E Item Number: R002-1G
Ribostamycin Sulfate 1 g CAS number 53797-35-6 and purity (On Dried Basis): ≥630µg/mg...
Price excludes taxes and shipping charges. Save -10%
£616.55 £685.06
Ribostamycin Sulfate 250 mg
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Manufacturer: TOKU-E Item Number: R002-250MG
Ribostamycin Sulfate 250 mg CAS number 53797-35-6 and purity (On Dried Basis): ≥630µg/mg...
Price excludes taxes and shipping charges. Save -10%
£283.23 £314.70
Ridaforolimus 1 mg
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Manufacturer: TOKU-E Item Number: R032-1MG
Ridaforolimus 1 mg CAS number 572924-54-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£143.54 £159.49
Ridaforolimus 5 mg
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Manufacturer: TOKU-E Item Number: R032-5MG
Ridaforolimus 5 mg CAS number 572924-54-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£497.57 £552.86
Rifampicin 1 g
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Manufacturer: 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%
£92.48 £102.76
Rifampicin 25 g
Actual product may differ from image
Manufacturer: 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%
£704.70 £783.00
Rifampicin 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R003-5G
Rifampicin 5 g CAS number 13292-46-1 and purity (On Dried Basis): 97.0-102.0%...
Price excludes taxes and shipping charges. Save -10%
£320.80 £356.44
Rifampicin Sodium 1 g
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Manufacturer: TOKU-E Item Number: R040-1G
Rifampicin Sodium 1 g CAS number 38776-75-9 and purity ≥ 900 IU/mg...
Price excludes taxes and shipping charges. Save -10%
£119.46 £132.73
Rifampicin Sodium 5 g
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Manufacturer: TOKU-E Item Number: R040-5G
Rifampicin Sodium 5 g CAS number 38776-75-9 and purity ≥ 900 IU/mg...
Price excludes taxes and shipping charges. Save -10%
£417.13 £463.48
Rifampicin Solution (10mg/mL in water) sterile filtered 100 mL
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Manufacturer: 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...
Price excludes taxes and shipping charges. Save -10%
£183.04 £203.38
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Rifampicin Solution (10mg/mL in water) sterile filtered 20 mL
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Manufacturer: TOKU-E Item Number: R041-20ML
Rifampicin Solution (10mg/mL in water) sterile filtered 20 mL CAS number 13292-46-1 and purity nan...
Price excludes taxes and shipping charges. Save -10%
£68.88 £76.53
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Ristocetin A Sulfate 10 mg
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Manufacturer: TOKU-E Item Number: R019-10MG
Ristocetin A Sulfate 10 mg CAS number 11140-99-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Ristocetin A Sulfate 50 mg
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Manufacturer: TOKU-E Item Number: R019-50MG
Ristocetin A Sulfate 50 mg CAS number 11140-99-1 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
RK-682 0.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R033-0.5MG
RK-682 0.5 mg CAS number 332131-32-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£243.73 £270.81
RK-682 2.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R033-2.5MG
RK-682 2.5 mg CAS number 332131-32-5 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£849.68 £944.09
Roccellic Acid 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R048-1MG
Roccellic Acid 1 mg CAS number 29838-46-8 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£149.81 £166.45
Roccellic Acid 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R048-5MG
Roccellic Acid 5 mg CAS number 29838-46-8 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£523.11 £581.23
Rocuronium Bromide 250mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R045-250MG
Rocuronium Bromide 250mg CAS number 119302-91-9 and purity (On Dried Basis): 99-101%...
Price excludes taxes and shipping charges. Save -10%
£322.72 £358.58
Rocuronium Bromide 50mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R045-50MG
Rocuronium Bromide 50mg CAS number 119302-91-9 and purity (On Dried Basis): 99-101%...
Price excludes taxes and shipping charges. Save -10%
£93.45 £103.83
Rolitetracycline 25 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R023-25MG
Rolitetracycline 25 mg CAS number 751-97-3 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£315.50 £350.56
Rolitetracycline 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R023-5MG
Rolitetracycline 5 mg CAS number 751-97-3 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£91.04 £101.15
Roquefortine C 0.5 mg
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Manufacturer: TOKU-E Item Number: R034-0.5MG
Roquefortine C 0.5 mg CAS number 58735-64-1 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£272.63 £302.92
Roquefortine C 2.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R034-2.5MG
Roquefortine C 2.5 mg CAS number 58735-64-1 and purity >99% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£949.87 £1,055.41
Roquefortine E 1 mg
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Manufacturer: TOKU-E Item Number: R035-1MG
Roquefortine E 1 mg CAS number 871982-52-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£184.97 £205.52
Roquefortine E 5 mg
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Manufacturer: TOKU-E Item Number: R035-5MG
Roquefortine E 5 mg CAS number 871982-52-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£645.93 £717.70
Roseoflavin 1 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R039-1MG
Roseoflavin 1 mg CAS number 51093-55-1 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£119.93 £133.26
Roseoflavin 5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R039-5MG
Roseoflavin 5 mg CAS number 51093-55-1 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£416.66 £462.95
Roxithromycin 10 g
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Manufacturer: TOKU-E Item Number: R005-10G
Roxithromycin 10 g CAS number 80214-83-1 and purity (On Dried Basis): 97.0-101.0%...
Price excludes taxes and shipping charges. Save -10%
£120.42 £133.80
Roxithromycin 5 g
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R005-5G
Roxithromycin 5 g CAS number 80214-83-1 and purity (On Dried Basis): 97.0-101.0%...
Price excludes taxes and shipping charges. Save -10%
£66.95 £74.39
Rubiginone D2 0.5 mg
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Manufacturer: TOKU-E Item Number: R049-0.5MG
Rubiginone D2 0.5 mg CAS number 274913-71-2 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£179.67 £199.63
Rubiginone D2 2.5 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R049-2.5MG
Rubiginone D2 2.5 mg CAS number 274913-71-2 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£627.63 £697.37
Rucaparib 10 mg
Actual product may differ from image
Manufacturer: TOKU-E Item Number: R042-10MG
Rucaparib 10 mg CAS number 283173-50-2 and purity ≥98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£87.67 £97.41
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