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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.

Manufacturer: TOKU-E Item Number: I012-100MG
Imazapyr 100 mg CAS number 81334-34-1 and purity (As Is): ≥98.0%...
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£54.91 £61.01
Manufacturer: TOKU-E Item Number: I001-10MG
Imipenem 10 mg CAS number 74431-23-5 and purity (On Dried Basis): ≥ 95.0%...
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£89.59 £99.55
Manufacturer: TOKU-E Item Number: I001-25MG
Imipenem 25 mg CAS number 74431-23-5 and purity (On Dried Basis): ≥ 95.0%...
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£150.77 £167.52
Manufacturer: TOKU-E Item Number: I005-10MG
Imipenem mixture w/cilastatin 10 mg CAS number 74431-23-5; 82009-34-4 and purity Imipenem: ≥ 400µg/mg Cilastatin: ≥ 400µg/mg Imipenem/Cilastatin: 0.95..
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£141.61 £157.35
Manufacturer: TOKU-E Item Number: I005-25MG
Imipenem mixture w/cilastatin 25 mg CAS number 74431-23-5; 82009-34-5 and purity Imipenem: ≥ 400µg/mg Cilastatin: ≥ 400µg/mg Imipenem/Cilastatin: 0.95..
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£296.71 £329.68
Manufacturer: TOKU-E Item Number: I005-50MG
Imipenem mixture w/cilastatin 50 mg CAS number 74431-23-5; 82009-34-5 and purity Imipenem: ≥ 400µg/mg Cilastatin: ≥ 400µg/mg Imipenem/Cilastatin: 0.95..
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£560.19 £622.44
Manufacturer: TOKU-E Item Number: I020-1MG
Indanomycin 1 mg CAS number 66513-28-8 and purity >95% by HPLC...
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£270.70 £300.78
Manufacturer: TOKU-E Item Number: I020-5MG
Indanomycin 5 mg CAS number 66513-28-8 and purity >95% by HPLC...
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£943.61 £1,048.46
Manufacturer: TOKU-E Item Number: I015-25G
Indole-3-butyric acid 25 g CAS number 133-32-4 and purity ≥ 95.0%...
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£125.24 £139.15
Manufacturer: TOKU-E Item Number: I015-5G
Indole-3-butyric acid 5 g CAS number 133-32-4 and purity ≥ 95.0%...
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£42.39 £47.10
Manufacturer: TOKU-E Item Number: I034-1G
Indole-3-carbinol 1 g CAS number 700-06-1 and purity ≥98%...
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£45.28 £50.31
Manufacturer: TOKU-E Item Number: I034-25G
Indole-3-carbinol 25 g CAS number 700-06-1 and purity ≥98%...
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£227.35 £252.61
Manufacturer: TOKU-E Item Number: I034-5G
Indole-3-carbinol 5 g CAS number 700-06-1 and purity ≥98%...
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£63.58 £70.65
Manufacturer: TOKU-E Item Number: I047-100MG
Indole-3-carboxaldehyde 100 mg CAS number 487-89-8 and purity >95% by HPLC...
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£183.04 £203.38
Manufacturer: TOKU-E Item Number: I047-25MG
Indole-3-carboxaldehyde 25 mg CAS number 487-89-8 and purity >95% by HPLC...
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£53.95 £59.94
Manufacturer: TOKU-E Item Number: I048-100MG
Indole-3-carboxylic acid 100 mg CAS number 771-50-6 and purity >95% by HPLC...
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£218.20 £242.45
Manufacturer: TOKU-E Item Number: I048-25MG
Indole-3-carboxylic acid 25 mg CAS number 771-50-6 and purity >95% by HPLC...
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£63.10 £70.11
Manufacturer: TOKU-E Item Number: I049-100MG
Indole-3-propionic acid 100 mg CAS number 830-96-6 and purity >95% by HPLC...
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£183.04 £203.38
Manufacturer: TOKU-E Item Number: I049-25MG
Indole-3-propionic acid 25 mg CAS number 830-96-6 and purity >95% by HPLC...
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£53.95 £59.94
Manufacturer: TOKU-E Item Number: I021-1MG
Indolmycin 1 mg CAS number 21200-24-8 and purity >95% by HPLC (total diastereoisomers)...
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£280.82 £312.02
Manufacturer: TOKU-E Item Number: I021-5MG
Indolmycin 5 mg CAS number 21200-24-8 and purity >95% by HPLC (total diastereoisomers)...
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£978.77 £1,087.53
Manufacturer: TOKU-E Item Number: I037-25G
Indomethacin 25 g CAS number 53-86-1 and purity ≥ 99.0%...
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£113.68 £126.31
Manufacturer: TOKU-E Item Number: I037-5x1G
Indomethacin 5 x 1 g CAS number 53-86-1 and purity ≥ 99.0%...
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£39.50 £43.89
Manufacturer: TOKU-E Item Number: I036-1MG
Ingenol-3-mebutate 1 mg CAS number 75567-37-2 and purity >98.0%...
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£151.73 £168.59
Manufacturer: TOKU-E Item Number: I022-1MG
Integracin A 1 mg CAS number 224186-03-2 and purity >95% by HPLC...
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£269.74 £299.71
Manufacturer: TOKU-E Item Number: I022-5MG
Integracin A 5 mg CAS number 224186-03-2 and purity >95% by HPLC...
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£940.24 £1,044.71
Manufacturer: TOKU-E Item Number: I023-1MG
Integracin B 1 mg CAS number 224186-05-4 and purity >95% by HPLC...
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£269.74 £299.71
Manufacturer: TOKU-E Item Number: I023-5MG
Integracin B 5 mg CAS number 224186-05-4 and purity >95% by HPLC...
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£940.24 £1,044.71
Manufacturer: TOKU-E Item Number: I003-1MG
Ionomycin 1 mg CAS number 56092-81-0 and purity >98% by HPLC...
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£93.93 £104.36
Manufacturer: TOKU-E Item Number: I003-5MG
Ionomycin 5 mg CAS number 56092-81-0 and purity >98% by HPLC...
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£325.13 £361.26
Manufacturer: TOKU-E Item Number: I011-10G
IPTG (Isopropyl β-D-1-thiogalactopyranoside) 10g CAS number 367-93-1 and purity ≥ 98.0%...
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£198.45 £220.50
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Manufacturer: TOKU-E Item Number: I011-1G
IPTG (Isopropyl β-D-1-thiogalactopyranoside) 1g CAS number 367-93-1 and purity ≥ 98.0%...
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£44.31 £49.24
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Manufacturer: TOKU-E Item Number: I011-5G
IPTG (Isopropyl β-D-1-thiogalactopyranoside) 5g CAS number 367-93-1 and purity ≥ 98.0%...
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£120.42 £133.80
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Manufacturer: TOKU-E Item Number: I002-25G
Irgasan (Triclosan) 25 g CAS number 3380-34-5 and purity (On Dried Basis): 97.0-103.0%...
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£118.98 £132.19
Manufacturer: TOKU-E Item Number: I002-5G
Irgasan (Triclosan) 5 g CAS number 3380-34-5 and purity (On Dried Basis): 97.0-103.0%...
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£39.50 £43.89
Manufacturer: TOKU-E Item Number: I043-100MG
Isavuconazole 100 mg CAS number 241479-67-5 and purity ≥99.0%...
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£312.13 £346.81
Manufacturer: TOKU-E Item Number: I043-50MG
Isavuconazole 50 mg CAS number 241479-67-4 and purity ≥99.0%...
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£184.48 £204.98
Manufacturer: TOKU-E Item Number: I042-25MG
Isepamicin Sulfate 25 mg CAS number 67814-76-0 and purity 680p9/mg - 780pg/mg...
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£192.67 £214.08
Manufacturer: TOKU-E Item Number: I040-0.1MG
Isoapoptolidin 0.1 mg CAS number 476647-30-0 and purity >90% by HPLC...
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£269.74 £299.71
Manufacturer: TOKU-E Item Number: I040-0.5MG
Isoapoptolidin 0.5 mg CAS number 476647-30-0 and purity >90% by HPLC...
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£940.24 £1,044.71
Manufacturer: TOKU-E Item Number: I017-100MG
Isoaureomycin (isochlortetracycline) EvoPure® 100 mg CAS number 514-53-4 and purity >97% (by HPLC, as-is)...
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£385.83 £428.70
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Manufacturer: TOKU-E Item Number: I024-1MG
Isocyclosporin A 1 mg CAS number 59865-16-6 and purity >98% by HPLC...
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£123.79 £137.55
Manufacturer: TOKU-E Item Number: I024-5MG
Isocyclosporin A 5 mg CAS number 59865-16-6 and purity >98% by HPLC...
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£429.18 £476.86
Manufacturer: TOKU-E Item Number: I004-100G
Isoniazid 100 g CAS number 54-85-3 and purity (On Dried Basis): 99.0-100.5%...
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£57.80 £64.22
Manufacturer: TOKU-E Item Number: I004-5G
Isoniazid 5 g CAS number 54-85-3 and purity (On Dried Basis): 99.0-100.5%...
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£24.08 £26.76
Manufacturer: TOKU-E Item Number: I004-50G
Isoniazid 50 g CAS number 54-85-3 and purity (On Dried Basis): 99.0-100.5%...
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£29.86 £33.18
Manufacturer: TOKU-E Item Number: I038-1MG
Isoxanthohumol 1 mg CAS number 521-48-2 and purity ≥ 98.0%...
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£83.33 £92.59
Manufacturer: TOKU-E Item Number: I045-1MG
IT-143A 1 mg CAS number 183485-32-7 and purity >95% by HPLC...
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£217.24 £241.38
Manufacturer: TOKU-E Item Number: I045-5MG
IT-143A 5 mg CAS number 183485-32-7 and purity >95% by HPLC...
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£755.76 £839.73
Manufacturer: TOKU-E Item Number: I046-1MG
IT-143B 1 mg CAS number 183485-34-9 and purity >95% by HPLC...
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£217.24 £241.38
Manufacturer: TOKU-E Item Number: I046-5MG
IT-143B 5 mg CAS number 183485-34-9 and purity >95% by HPLC...
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£755.76 £839.73
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