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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.

IPTG (Isopropyl  β-D-1-thiogalactopyranoside) 1g
Actual product may differ from image
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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£42.87 £47.63
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IPTG (Isopropyl  β-D-1-thiogalactopyranoside) 5g
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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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£116.57 £129.52
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Irgasan (Triclosan) 25 g
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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%...
Price excludes taxes and shipping charges. Save -10%
£115.12 £127.91
Irgasan (Triclosan) 5 g
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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%...
Price excludes taxes and shipping charges. Save -10%
£38.05 £42.28
Isavuconazole 100 mg
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Manufacturer: TOKU-E Item Number: I043-100MG
Isavuconazole 100 mg CAS number 241479-67-5 and purity ≥99.0%...
Price excludes taxes and shipping charges. Save -10%
£302.98 £336.64
Isavuconazole 50 mg
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Manufacturer: TOKU-E Item Number: I043-50MG
Isavuconazole 50 mg CAS number 241479-67-4 and purity ≥99.0%...
Price excludes taxes and shipping charges. Save -10%
£178.70 £198.56
Isepamicin Sulfate 25 mg
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Manufacturer: TOKU-E Item Number: I042-25MG
Isepamicin Sulfate 25 mg CAS number 67814-76-0 and purity 680p9/mg - 780pg/mg...
Price excludes taxes and shipping charges. Save -10%
£186.89 £207.66
Isoapoptolidin 0.1 mg
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Manufacturer: TOKU-E Item Number: I040-0.1MG
Isoapoptolidin 0.1 mg CAS number 476647-30-0 and purity >90% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£261.55 £290.61
Isoapoptolidin 0.5 mg
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Manufacturer: TOKU-E Item Number: I040-0.5MG
Isoapoptolidin 0.5 mg CAS number 476647-30-0 and purity >90% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£912.78 £1,014.20
Isoaureomycin (isochlortetracycline) EvoPure® 100 mg
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Manufacturer: TOKU-E Item Number: I017-100MG
Isoaureomycin (isochlortetracycline) EvoPure® 100 mg CAS number 514-53-4 and purity >97% (by HPLC, as-is)...
Price excludes taxes and shipping charges. Save -10%
£374.27 £415.85
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Isocyclosporin A 1 mg
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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...
Price excludes taxes and shipping charges. Save -10%
£119.93 £133.26
Isocyclosporin A 5 mg
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Manufacturer: TOKU-E Item Number: I024-5MG
Isocyclosporin A 5 mg CAS number 59865-16-6 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£416.66 £462.95
Isoniazid 100 g
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Manufacturer: TOKU-E Item Number: I004-100G
Isoniazid 100 g CAS number 54-85-3 and purity (On Dried Basis): 99.0-100.5%...
Price excludes taxes and shipping charges. Save -10%
£55.87 £62.08
Isoniazid 5 g
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Manufacturer: TOKU-E Item Number: I004-5G
Isoniazid 5 g CAS number 54-85-3 and purity (On Dried Basis): 99.0-100.5%...
Price excludes taxes and shipping charges. Save -10%
£23.12 £25.69
Isoniazid 50 g
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Manufacturer: TOKU-E Item Number: I004-50G
Isoniazid 50 g CAS number 54-85-3 and purity (On Dried Basis): 99.0-100.5%...
Price excludes taxes and shipping charges. Save -10%
£28.90 £32.11
Isoxanthohumol 1 mg
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Manufacturer: TOKU-E Item Number: I038-1MG
Isoxanthohumol 1 mg CAS number 521-48-2 and purity ≥ 98.0%...
Price excludes taxes and shipping charges. Save -10%
£80.44 £89.38
IT-143A 1 mg
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Manufacturer: TOKU-E Item Number: I045-1MG
IT-143A 1 mg CAS number 183485-32-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£210.49 £233.88
IT-143A 5 mg
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Manufacturer: TOKU-E Item Number: I045-5MG
IT-143A 5 mg CAS number 183485-32-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£733.60 £815.11
IT-143B 1 mg
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Manufacturer: TOKU-E Item Number: I046-1MG
IT-143B 1 mg CAS number 183485-34-9 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£210.49 £233.88
IT-143B 5 mg
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Manufacturer: TOKU-E Item Number: I046-5MG
IT-143B 5 mg CAS number 183485-34-9 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£733.60 £815.11
Itraconazole 100 mg
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Manufacturer: TOKU-E Item Number: I006-100MG
Itraconazole 100 mg CAS number 84625-61-6 and purity (On Dried Basis): 98.5-101.0%...
Price excludes taxes and shipping charges. Save -10%
£160.88 £178.76
Itraconazole 500 mg
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Manufacturer: TOKU-E Item Number: I006-500MG
Itraconazole 500 mg CAS number 84625-61-6 and purity (On Dried Basis): 98.5-101.0%...
Price excludes taxes and shipping charges. Save -10%
£544.78 £605.31
Ivermectin 1 g
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Manufacturer: TOKU-E Item Number: I008-1G
Ivermectin 1 g CAS number 70288-86-7 and purity (On Dried Basis): 95.0-102.2%...
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£84.78 £94.20
Ivermectin 250 mg
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Manufacturer: TOKU-E Item Number: I008-250MG
Ivermectin 250 mg CAS number 70288-86-7 and purity (On Dried Basis): 95.0-102.2%...
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£32.75 £36.39
Ivermectin B1a 25 mg
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Manufacturer: TOKU-E Item Number: I025-25MG
Ivermectin B1a 25 mg CAS number 71827-03-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£586.21 £651.34
Ivermectin B1a 5 mg
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Manufacturer: TOKU-E Item Number: I025-5MG
Ivermectin B1a 5 mg CAS number 71827-03-7 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£168.10 £186.78
Ivermectin B1a aglycone 1 mg
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Manufacturer: TOKU-E Item Number: I026-1MG
Ivermectin B1a aglycone 1 mg CAS number 123997-59-1 and purity >99% by HPLC...
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£272.63 £302.92
Ivermectin B1a aglycone 5 mg
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Manufacturer: TOKU-E Item Number: I026-5MG
Ivermectin B1a aglycone 5 mg CAS number 123997-59-1 and purity >99% by HPLC...
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£949.87 £1,055.41
Ivermectin B1a monosaccharide 1 mg
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Manufacturer: TOKU-E Item Number: I027-1MG
Ivermectin B1a monosaccharide 1 mg CAS number 123997-64-8 and purity >99% by HPLC...
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£272.63 £302.92
Ivermectin B1a monosaccharide 5 mg
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Manufacturer: TOKU-E Item Number: I027-5MG
Ivermectin B1a monosaccharide 5 mg CAS number 123997-64-8 and purity >99% by HPLC...
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£949.87 £1,055.41
Ixazomib Citrate 10 mg
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Manufacturer: TOKU-E Item Number: I030-10MG
Ixazomib Citrate 10 mg CAS number 1239908-20-3 and purity ≥ 98.0% (HPLC)...
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£181.59 £201.77
α-apo-oxytetracycline EvoPure® 100 mg
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Manufacturer: TOKU-E Item Number: O009-100MG
α-apo-oxytetracycline EvoPure® 100 mg CAS number 18695-01-7 and purity >97% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£310.68 £345.20
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α-Mangostin 10 mg
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Manufacturer: TOKU-E Item Number: M076-10MG
α-Mangostin 10 mg CAS number 6147-11-1 and purity ≥98.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£171.96 £191.07
α-Mangostin 50 mg
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Manufacturer: TOKU-E Item Number: M076-50MG
α-Mangostin 50 mg CAS number 6147-11-1 and purity ≥98.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£641.12 £712.35
α-Naphthaleneacetic acid (1-NAA) 100 g
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Manufacturer: TOKU-E Item Number: N024-100G
α-Naphthaleneacetic acid (1-NAA) 100 g CAS number 86-87-3 and purity ≥98%...
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£59.72 £66.36
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α-Naphthaleneacetic acid (1-NAA) 25 g
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Manufacturer: TOKU-E Item Number: N024-25G
α-Naphthaleneacetic acid (1-NAA) 25 g CAS number 86-87-3 and purity ≥98%...
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£27.94 £31.04
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β-Apo-oxytetracycline EvoPure® 100 mg
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Manufacturer: TOKU-E Item Number: O042-100MG
β-Apo-oxytetracycline EvoPure® 100 mg CAS number 18751-99-0 and purity >90% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£330.44 £367.15
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γ-Mangostin 10 mg
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Manufacturer: TOKU-E Item Number: M077-10MG
γ-Mangostin 10 mg CAS number 31271-07-5 and purity ≥98.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£366.56 £407.29
γ-Mangostin 50 mg
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Manufacturer: TOKU-E Item Number: M077-50MG
γ-Mangostin 50 mg CAS number 31271-07-5 and purity ≥98.0% (HPLC)...
Price excludes taxes and shipping charges. Save -10%
£1,217.69 £1,352.99
Janthitrem A 0.5 mg
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Manufacturer: TOKU-E Item Number: J002-0.5MG
Janthitrem A 0.5 mg CAS number 73561-89-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£179.67 £199.63
Janthitrem A 2.5 mg
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Manufacturer: TOKU-E Item Number: J002-2.5mg
Janthitrem A 2.5 mg CAS number 73561-89-4 and purity >95% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£627.63 £697.37
Josamycin 100mg
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Manufacturer: TOKU-E Item Number: J001-100MG
Josamycin 100mg CAS number 16846-24-5 and purity ≥95% ...
Price excludes taxes and shipping charges. Save -10%
£83.81 £93.12
Josamycin 500mg
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Manufacturer: TOKU-E Item Number: J001-500MG
Josamycin 500mg CAS number 16846-24-5 and purity ≥95% ...
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£322.72 £358.58
K252A 0.5 mg
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Manufacturer: TOKU-E Item Number: K016-0.5MG
K252A 0.5 mg CAS number 99570-78-2 and purity >98% by HPLC...
Price excludes taxes and shipping charges. Save -10%
£184.01 £204.45
K252A 2.5 mg
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Manufacturer: TOKU-E Item Number: K016-2.5MG
K252A 2.5 mg CAS number 99570-78-2 and purity >98% by HPLC...
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£642.56 £713.96
Kanamycin A Sulfate EvoPure® 100 mg
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Manufacturer: TOKU-E Item Number: K013-100MG
Kanamycin A Sulfate EvoPure® 100 mg CAS number 25389-94-0 and purity >99% by HPLC...
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£263.96 £293.29
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Kanamycin Acid Sulfate BP 25 g
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Manufacturer: TOKU-E Item Number: K004-25G
Kanamycin Acid Sulfate BP 25 g CAS number 64013-70-3 and purity ≥ 670 lU/mg...
Price excludes taxes and shipping charges. Save -10%
£288.05 £320.05
Kanamycin Acid Sulfate BP 5 g
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Manufacturer: TOKU-E Item Number: K004-5G
Kanamycin Acid Sulfate BP 5 g CAS number 64013-70-3 and purity ≥ 670 lU/mg...
Price excludes taxes and shipping charges. Save -10%
£67.91 £75.46
Kanamycin Acid Sulfate for BioProcessing 25 g
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Manufacturer: TOKU-E Item Number: K012-25G
Kanamycin Acid Sulfate for BioProcessing 25 g CAS number 64013-70-3 and purity ≥ 670 lU/mg...
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£440.74 £489.71
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Kanamycin Acid Sulfate for BioProcessing 5 g
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Manufacturer: TOKU-E Item Number: K012-5G
Kanamycin Acid Sulfate for BioProcessing 5 g CAS number 64013-70-3 and purity ≥ 670 lU/mg...
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£107.42 £119.35
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Kanamycin Acid Sulfate ReadyMade Solution 10 x 1 mL
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Manufacturer: TOKU-E Item Number: K035-10x1ML
Kanamycin Acid Sulfate ReadyMade Solution 10 x 1 mL CAS number 64013-70-3 and purity >=670 IU/mg (dried basis)...
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£68.88 £76.53
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