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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: P007-10MU
Polymyxin B Sulfate 10 MU CAS number 1405-20-5 and purity (On Dried Basis): ≥6000 u/mg...
Price excludes taxes and shipping charges. Save -10%
£129.09 £143.43
Brand: TOKU-E Item Number: P007-100MU
Polymyxin B Sulfate 100 MU CAS number 1405-20-5 and purity (On Dried Basis): ≥6000 u/mg...
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£496.13 £551.26
Brand: TOKU-E Item Number: P037-10MG
Polymyxin B1 Sulfate EvoPure® 10 mg CAS number 4135-11-09 and purity >98% by HPLC...
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£686.39 £762.66
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Brand: TOKU-E Item Number: P038-10MG
Polymyxin B1-I Sulfate EvoPure® 10 mg CAS number 80469-10-9 and purity >90% by HPLC...
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£686.39 £762.66
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Brand: TOKU-E Item Number: P039-10MG
Polymyxin B2 Sulfate EvoPure® 10 mg CAS number nan and purity >90% by HPLC...
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£686.39 £762.66
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Brand: TOKU-E Item Number: P040-5MG
Polymyxin B3 Sulfate EvoPure® 5 mg CAS number nan and purity >85% by HPLC...
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£950.84 £1,056.48
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Brand: TOKU-E Item Number: P056-10MG
Polymyxin E2 Sulfate EvoPure® 10 mg CAS number 7239-48-7 (free base) and purity >90% by HPLC...
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£427.73 £475.26
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Brand: TOKU-E Item Number: P138-10MG
Ponazuril 10 mg CAS number 69004-04-2 and purity (On Dried Basis): 98-102% ...
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£166.18 £184.64
Brand: TOKU-E Item Number: P138-100MG
Ponazuril 100 mg CAS number 69004-04-2 and purity (On Dried Basis): 98-102% ...
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£675.80 £750.89
Brand: TOKU-E Item Number: P139-10MG
Posaconazole 10 mg CAS number 171228-49-2 and purity (On Dried Basis): 98-102% ...
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£125.24 £139.15
Brand: TOKU-E Item Number: P139-100MG
Posaconazole 100 mg CAS number 171228-49-2 and purity (On Dried Basis): 98-102% ...
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£523.59 £581.76
Brand: TOKU-E Item Number: P163-50MG
Pradofloxacin 50 mg CAS number 195532-12-8 and purity >=98%...
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£157.03 £174.48
Brand: TOKU-E Item Number: P093-100MG
Pravastatin sodium 100 mg CAS number 81131-70-6 and purity >98% by HPLC...
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£325.13 £361.26
Brand: TOKU-E Item Number: P093-25MG
Pravastatin sodium 25 mg CAS number 81131-70-6 and purity >98% by HPLC...
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£93.93 £104.36
Brand: TOKU-E Item Number: P011-25G
Praziquantel 25 g CAS number 55268-74-1 and purity 98.5-101.0%...
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£177.26 £196.95
Brand: TOKU-E Item Number: P011-5G
Praziquantel 5 g CAS number 55268-74-1 and purity 98.5-101.0%...
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£39.50 £43.89
Brand: TOKU-E Item Number: P142-10MG
Pretomanid 10 mg CAS number 187235-37-6 and purity ≥98%...
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£113.68 £126.31
Brand: TOKU-E Item Number: P142-100MG
Pretomanid 100 mg CAS number 187235-37-6 and purity ≥98%...
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£362.22 £402.47
Brand: TOKU-E Item Number: P142-50MG
Pretomanid 50 mg CAS number 187235-37-6 and purity ≥98%...
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£249.03 £276.70
Brand: TOKU-E Item Number: P018-10MG
Pristinamycin 10 mg CAS number 270076-60-3 and purity ≥95% (by HPLC)...
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£415.69 £461.88
Brand: TOKU-E Item Number: P018-50MG
Pristinamycin 50 mg CAS number 270076-60-3 and purity ≥95% (by HPLC)...
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£1,150.25 £1,278.06
Brand: TOKU-E Item Number: P094-0.5MG
Prodigiosin 0.5 mg CAS number 82-89-3 and purity >95% by HPLC...
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£283.23 £314.70
Brand: TOKU-E Item Number: P094-2.5MG
Prodigiosin 2.5 mg CAS number 82-89-3 and purity >95% by HPLC...
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£977.81 £1,086.46
Brand: TOKU-E Item Number: P122-1G
Propineb 1 g CAS number 12071-83-9 and purity nan...
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£84.29 £93.66
Brand: TOKU-E Item Number: P122-250MG
Propineb 250 mg CAS number 12071-83-9 and purity nan...
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£31.79 £35.32
Brand: TOKU-E Item Number: P165-1G
Prothionamide 1 g CAS number 14222-60-7 and purity 99.0 - 101.0%...
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£77.07 £85.63
Brand: TOKU-E Item Number: P165-5G
Prothionamide 5 g CAS number 14222-60-7 and purity 99.0 - 101.0%...
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£214.83 £238.70
Brand: TOKU-E Item Number: P160-100MG
Protoporphyrin, disodium salt 100 mg CAS number 50865-01-5 and purity >95% by HPLC...
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£183.04 £203.38
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Brand: TOKU-E Item Number: P160-25MG
Protoporphyrin, disodium salt 25 mg CAS number 50865-01-5 and purity >95% by HPLC...
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£53.95 £59.94
Brand: TOKU-E Item Number: P057-5MG
Pseudo erythromycin A enol ether EvoPure® 5 mg CAS number 105882-69-7 and purity >95.0%...
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£488.91 £543.23
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Brand: TOKU-E Item Number: P095-100MG
Pseudomonic acid 100 mg CAS number 12650-69-0 and purity >95% by HPLC...
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£665.68 £739.65
Brand: TOKU-E Item Number: P095-25MG
Pseudomonic acid 25 mg CAS number 12650-69-0 and purity >95% by HPLC...
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£190.75 £211.94
Brand: TOKU-E Item Number: P096-1MG
Pseurotin A 1 mg CAS number 58523-30-1 and purity >99% by HPLC...
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£117.05 £130.05
Brand: TOKU-E Item Number: P096-5MG
Pseurotin A 5 mg CAS number 58523-30-1 and purity >99% by HPLC...
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£406.06 £451.17
Brand: TOKU-E Item Number: P161-1MG
Psychotridine 1 mg CAS number 52617-25-1 and purity >95% by HPLC...
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£217.24 £241.38
Brand: TOKU-E Item Number: P161-5MG
Psychotridine 5 mg CAS number 52617-25-1 and purity >95% by HPLC...
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£755.76 £839.73
Brand: TOKU-E Item Number: P097-25MG
Puromycin 25 mg CAS number 53-79-2 and purity >98% by HPLC...
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£325.13 £361.26
Brand: TOKU-E Item Number: P097-5MG
Puromycin 5 mg CAS number 53-79-2 and purity >98% by HPLC...
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£93.93 £104.36
Brand: TOKU-E Item Number: P041-100MG
Puromycin Aminonucleoside 100 mg CAS number 58-60-6 and purity ≥ 99% (HPLC)...
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£539.96 £599.96
Brand: TOKU-E Item Number: P041-1G
Puromycin Aminonucleoside is the aminonucleoside portion of Puromycin.  It is a Puromycin derivative that lacks the methoxyphenylalanyl group on ..
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£3,074.56 £3,416.18
Brand: TOKU-E Item Number: P041-500MG
Puromycin Aminonucleoside 500 mg CAS number 58-60-6 and purity ≥ 99% (HPLC)...
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£1,785.59 £1,983.99
Brand: TOKU-E Item Number: P025-10x1ML
Puromycin DiHCl Solution (10 mg/mL in 20 mM HEPES) 10 x 1 mL CAS number 58-58-2 and purity ≥ 99% (HPLC)...
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£201.82 £224.25
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Brand: TOKU-E Item Number: P026-20ML
Puromycin DiHCl Solution (10 mg/mL in 20 mM HEPES) 20 mL CAS number 58-58-2 and purity ≥ 98%...
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£336.69 £374.10
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Brand: TOKU-E Item Number: P025-5x1ML
Puromycin DiHCl Solution (10 mg/mL in 20 mM HEPES) 5 x 1 mL CAS number 58-58-2 and purity ≥ 99% (HPLC)...
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£126.20 £140.22
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Brand: TOKU-E Item Number: P001-1G
Puromycin Dihydrochloride 1 g CAS number 58-58-2 and purity ≥ 98%...
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£930.61 £1,034.01
Brand: TOKU-E Item Number: P001-100MG
Puromycin Dihydrochloride 100 mg CAS number 58-58-2 and purity ≥ 98%...
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£123.31 £137.01
Brand: TOKU-E Item Number: P001-250MG
Puromycin Dihydrochloride 250 mg CAS number 58-58-2 and purity ≥ 98%...
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£240.84 £267.60
Brand: TOKU-E Item Number: P001-500MG
Puromycin Dihydrochloride 500 mg CAS number 58-58-2 and purity ≥ 98%...
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£470.60 £522.89
Brand: TOKU-E Item Number: P103-100G
Putrescine Dihydrochloride 100 g CAS number 333-93-7 and purity ≥ 98%...
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£171.48 £190.53
Brand: TOKU-E Item Number: P103-25G
Putrescine Dihydrochloride 25 g CAS number 333-93-7 and purity ≥ 98%...
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£36.61 £40.68
Brand: TOKU-E Item Number: P098-1MG
Pyoluteorin 1 mg CAS number 25683-07-2 and purity >98% by HPLC...
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£269.74 £299.71
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