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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.

Aureusimine B 1 mg
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Manufacturer: TOKU-E Item Number: A150-1MG
Aureusimine B 1 mg CAS number 170713-71-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£230.72 £256.36
Aureusimine B 5 mg
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Manufacturer: TOKU-E Item Number: A150-5MG
Aureusimine B 5 mg CAS number 170713-71-0 and purity >95% by HPLC...
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£805.85 £895.39
Avenaciolide 0.5 mg
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Manufacturer: TOKU-E Item Number: A136-0.5MG
Avenaciolide 0.5 mg CAS number 16993-42-3 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£230.72 £256.36
Avenaciolide 2.5 mg
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Manufacturer: TOKU-E Item Number: A136-2.5MG
Avenaciolide 2.5 mg CAS number 16993-42-3 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£805.85 £895.39
Avermectin B1a aglycone 1 mg
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Manufacturer: TOKU-E Item Number: A137-1MG
Avermectin B1a aglycone 1 mg CAS number 71828-14-3 and purity >95% by HPLC...
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£261.55 £290.61
Avermectin B1a aglycone 5 mg
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Manufacturer: TOKU-E Item Number: A137-5MG
Avermectin B1a aglycone 5 mg CAS number 71828-14-3 and purity >95% by HPLC...
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£912.78 £1,014.20
Avermectin B1a EvoPure® 5 mg
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Manufacturer: TOKU-E Item Number: A063-5MG
Avermectin B1a EvoPure® 5 mg CAS number 65195-55-3 and purity >99% by HPLC...
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£475.42 £528.24
Avermectin B1a monosaccharide 1 mg
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Manufacturer: TOKU-E Item Number: A138-1MG
Avermectin B1a monosaccharide 1 mg CAS number 71831-09-9 and purity >95% by HPLC...
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£261.55 £290.61
Avermectin B1a monosaccharide 5 mg
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Manufacturer: TOKU-E Item Number: A138-5MG
Avermectin B1a monosaccharide 5 mg CAS number 71831-09-9 and purity >95% by HPLC...
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£912.78 £1,014.20
Avermectin B1b 0.5 mg
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Manufacturer: TOKU-E Item Number: A139-0.5MG
Avermectin B1b 0.5 mg CAS number 65195-56-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£296.71 £329.68
Avermectin B1b 2.5 mg
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Manufacturer: TOKU-E Item Number: A139-2.5MG
Avermectin B1b 2.5 mg CAS number 65195-56-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£1,038.02 £1,153.36
Avibactam sodium 10 mg
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Manufacturer: TOKU-E Item Number: A156-10MG
Avibactam sodium 10 mg CAS number 1192491-61-4 and purity ≥95.0%...
Price excludes taxes and shipping charges. Save -10%
£317.91 £353.23
Avilamycin A 1 mg
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Manufacturer: TOKU-E Item Number: A220-1MG
Avilamycin A 1 mg CAS number 69787-79-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£210.49 £233.88
Avilamycin A 5 mg
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Manufacturer: TOKU-E Item Number: A220-5MG
Avilamycin A 5 mg CAS number 69787-79-7 and purity >95% by HPLC...
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£733.60 £815.11
Avilamycin C 1 mg
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Manufacturer: TOKU-E Item Number: A221-1MG
Avilamycin C 1 mg CAS number 69787-80-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£210.49 £233.88
Avilamycin C 5 mg
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Manufacturer: TOKU-E Item Number: A221-5MG
Avilamycin C 5 mg CAS number 69787-80-0 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£733.60 £815.11
Avrainvillamide 0.25 mg
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Manufacturer: TOKU-E Item Number: A222-0.25MG
Avrainvillamide 0.25 mg CAS number 269741-97-1 and purity >95% by HPLC...
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£179.67 £199.63
Avrainvillamide 1 mg
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Manufacturer: TOKU-E Item Number: A222-1MG
Avrainvillamide 1 mg CAS number 269741-97-1 and purity >95% by HPLC...
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£627.63 £697.37
Azamulin 1 mg
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Manufacturer: TOKU-E Item Number: A140-1MG
Azamulin 1 mg CAS number 76530-44-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£194.60 £216.22
Azamulin 5 mg
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Manufacturer: TOKU-E Item Number: A140-5MG
Azamulin 5 mg CAS number 76530-44-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£676.76 £751.96
Azidamfenicol 1 mg
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Manufacturer: TOKU-E Item Number: A141-1MG
Azidamfenicol 1 mg CAS number 13838-08-9 and purity >95% by HPLC...
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£175.33 £194.81
Azidamfenicol 5 mg
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Manufacturer: TOKU-E Item Number: A141-5MG
Azidamfenicol 5 mg CAS number 13838-08-9 and purity >95% by HPLC...
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£610.29 £678.10
Azithromycin dihydrate 25 mg
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Manufacturer: TOKU-E Item Number: A024-25MG
Azithromycin dihydrate 25 mg CAS number 117772-70-0 9 (dihydrate); 83905-01-5 (Dried); 121479-24-4 (monohydrate) and purity (On Dried Basi): 945-1030 ..
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£263.96 £293.29
Azithromycin impurity E EvoPure® 5 mg
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Manufacturer: TOKU-E Item Number: A074-5MG
Azithromycin impurity E EvoPure® 5 mg CAS number 612069-27-9 and purity >95% (HPLC)...
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£692.66 £769.62
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Azithromycin impurity F EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: A075-10MG
Azithromycin impurity F EvoPure® 10 mg CAS number 612069-28-0 and purity >95% (HPLC)...
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£550.08 £611.20
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Azithromycin impurity G EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: A083-10MG
Azithromycin impurity G EvoPure® 10 mg CAS number 612069-31-5 and purity >95% (HPLC)...
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£339.59 £377.32
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Azithromycin impurity H EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: A084-10MG
Azithromycin impurity H EvoPure® 10 mg CAS number 612069-30-4 and purity >95% (HPLC)...
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£358.37 £398.19
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Azithromycin impurity I EvoPure® 25 mg
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Manufacturer: TOKU-E Item Number: A081-25MG
Azithromycin impurity I EvoPure® 25 mg CAS number 172617-84-4 and purity >95% (HPLC)...
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£333.80 £370.89
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Azithromycin impurity J EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: A082-10MG
Azithromycin impurity J EvoPure® 10 mg CAS number 117693-41-1 and purity >95% (HPLC)...
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£692.66 £769.62
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Azithromycin impurity L EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: A078-10MG
Azithromycin impurity L EvoPure® 10 mg CAS number 90503-06-3 and purity >90.0%...
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£129.09 £143.43
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Azlocillin Sodium 1 g
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Manufacturer: TOKU-E Item Number: A023-1G
Azlocillin Sodium 1 g CAS number 37091-65-9 and purity (On Dried Basis): ≥90.0%...
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£80.44 £89.38
Azlocillin Sodium 5 g
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Manufacturer: TOKU-E Item Number: A023-5G
Azlocillin Sodium 5 g CAS number 37091-65-9 and purity (On Dried Basis): ≥90.0%...
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£308.75 £343.06
Aztreonam 100 mg
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Manufacturer: TOKU-E Item Number: A017-100MG
Aztreonam 100 mg CAS number 78110-38-0 and purity (On Dried Basis): 94.0-103.0%...
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£176.78 £196.42
Aztreonam 50 mg
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Manufacturer: TOKU-E Item Number: A017-50MG
Aztreonam 50 mg CAS number 78110-38-0 and purity (On Dried Basis): 94.0-103.0%...
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£111.27 £123.63
Aztreonam Solubilized 100 mg
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Manufacturer: TOKU-E Item Number: A038-100MG
Aztreonam Solubilized 100 mg CAS number 78110-38-0 and purity 90.0% to 105.0%...
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£184.01 £204.45
Aztreonam Solubilized 5 x 100mg
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Manufacturer: TOKU-E Item Number: A038-5x100MG
Aztreonam Solubilized 5 x 100mg CAS number 78110-38-0 and purity 90.0% to 105.0%...
Price excludes taxes and shipping charges. Save -10%
£872.33 £969.25
 4-CPPU 1 g
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Manufacturer: TOKU-E Item Number: C211-1G
4-CPPU 1 g CAS number 68157-60-8 and purity ≥ 99%...
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£147.88 £164.31
 4-CPPU 100 mg
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Manufacturer: TOKU-E Item Number: C211-100MG
4-CPPU 100 mg CAS number 68157-60-8 and purity ≥ 99%...
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£99.23 £110.25
Bacitracin 25 g
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Manufacturer: TOKU-E Item Number: B002-25G
Bacitracin 25 g CAS number 1405-87-4 and purity (On Dried Basis): 80 Iu/mg (as-is)...
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£261.07 £290.08
Bacitracin 5 g
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Manufacturer: TOKU-E Item Number: B002-5G
Bacitracin 5 g CAS number 1405-87-4 and purity (On Dried Basis): 80 Iu/mg (as-is)...
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£61.66 £68.51
Bacitracin A EvoPure® 10 mg
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Manufacturer: TOKU-E Item Number: B015-10MG
Bacitracin A EvoPure® 10 mg CAS number 22601-59-8 and purity ≥90% (HPLC)...
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£643.04 £714.49
Bacitracin A1 EvoPure® 2 mg
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Manufacturer: TOKU-E Item Number: B071-2MG
Bacitracin A1 EvoPure® 2 mg CAS number nan and purity >95% (HPLC)...
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£1,066.92 £1,185.47
Bacitracin B1 EvoPure® 2 mg
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Manufacturer: TOKU-E Item Number: B016-2MG
Bacitracin B1 EvoPure® 2 mg CAS number 57762-79-5 and purity >90% (HPLC)...
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£506.25 £562.50
Bacitracin B2 EvoPure® 2 mg
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Manufacturer: TOKU-E Item Number: B017-2MG
Bacitracin B2 EvoPure® 2 mg CAS number nan and purity >90% (HPLC)...
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£801.04 £890.04
Bacitracin B3 EvoPure® 2 mg
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Manufacturer: TOKU-E Item Number: B060-2MG
Bacitracin B3 EvoPure® 2 mg CAS number 149146-32-7 and purity >90% (HPLC)...
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£715.78 £795.31
Bacitracin CulturePure® 10 g
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Manufacturer: TOKU-E Item Number: B014-10G
Bacitracin CulturePure® 10 g CAS number 1405-87-4 and purity 80 u/mg...
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£144.99 £161.10
Bacitracin F EvoPure® 5 mg
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Manufacturer: TOKU-E Item Number: B021-5MG
Bacitracin F EvoPure® 5 mg CAS number 22601-63-4 and purity ≥95% (HPLC)...
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£912.30 £1,013.67
Bactenecin 1 mg
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Manufacturer: TOKU-E Item Number: B033-1MG
Bactenecin 1 mg CAS number 116229-36-8 and purity (HPLC): ≥96.0%...
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£823.67 £915.19
Bactenecin 500 µg
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Manufacturer: TOKU-E Item Number: B033-500µG
Bactenecin 500 µg CAS number 116229-36-8 and purity (HPLC): ≥96.0%...
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£488.42 £542.69
Bafilomycin A1 1 mg
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Manufacturer: TOKU-E Item Number: B038-1MG
Bafilomycin A1 1 mg CAS number 88899-55-2 and purity >95% by HPLC...
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£243.73 £270.81
Bafilomycin A1 5 mg
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Manufacturer: TOKU-E Item Number: B038-5MG
Bafilomycin A1 5 mg CAS number 88899-55-2 and purity >95% by HPLC...
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£849.68 £944.09
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