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Pharmaceutical Secondary Standard; Certified Reference Material

5-Chloro-2-(2,4-dichlorophenoxy)phenol, Triclosan, Irgasan
Empirical Formula (Hill Notation):
CAS Number:
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Quality Level


certified reference material
pharmaceutical secondary standard


current certificate can be downloaded


HPLC: suitable
gas chromatography (GC): suitable


pharmaceutical (small molecule)



pharmacopeia traceability

traceable to USP 1682206

storage temp.


SMILES string




InChI key


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General description

Certified pharmaceutical secondary standards for application in quality control provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to pharmacopeia primary standards.
Triclosan is a non-ionic broad spectrum antibacterial and antifungal agent, used in personal care products such as antiseptic soaps, toothpastes, fabrics and plastics.


These Secondary Standards are qualified as Certified Reference Materials. These are suitable for use in several analytical applications including but not limited to pharma release testing, pharma method development for qualitative and quantitative analyses, food and beverage quality control testing, and other calibration requirements.
Triclosan may be used as a pharmaceutical reference standard for the determination of the analyte in waste water samples and food stuffs by various chromatography methods.
A component of cefsulodin-irgasan-novobiocin selection medium for Yersinia, a human pathogen that may contaminate animal-source food products. Because of its low antigenicity, irgasan is also a component of many antibacterial consumer products.

Biochem/physiol Actions

Irgasan is a broad spectrum antimicrobial agent. It is an inhibitor of the enoyl-ACP (acyl-carrier protein) reductase component of type II fatty acid synthase (FAS-II) in bacteria and Plasmodium. It also inhibits mammalian fatty acid synthase (FASN), and may have anticarcinogenic activity.

Analysis Note

These secondary standards offer multi-traceability to the USP, EP (PhEur) and BP primary standards, where they are available.

Other Notes

This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis.


To see an example of a Certificate of Analysis for this material enter LRAA9502 in the slot below. This is an example certificate only and may not be the lot that you receive.


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Hazard Statements

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Eye Irrit. 2 - Skin Irrit. 2

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Triclosan: applications and safety
Bhargava HN and Leonard PA
American Journal of Infection Control, 24(3), 209-218 (1996)
Determination of triclosan in foodstuffs
Sanches-Silva A, et al.
Journal of Separation Science, 28(1), 65-72 (2005)
Z X Wang et al.
The British journal of surgery, 100(4), 465-473 (2013-01-23)
Surgical-site infections (SSIs) increase morbidity and mortality in surgical patients and represent an economic burden to healthcare systems. Experiments have shown that triclosan-coated sutures (TCS) are beneficial in the prevention of SSI, although the results from individual randomized controlled trials
Gilles Bedoux et al.
Environmental science and pollution research international, 19(4), 1044-1065 (2011-11-08)
A review was undertaken on the occurrence, toxicity, and degradation of triclosan (TCS; 5-chloro-2,4-dichlorophenoxy)phenol) in the environment. TCS is a synthetic, broad-spectrum antibacterial agent incorporated in a wide variety of household and personal care products such as hand soap, toothpaste
Joseph V Rodricks et al.
Critical reviews in toxicology, 40(5), 422-484 (2010-04-10)
Triclosan (2,4,4'-trichloro-2'-hydroxy-diphenyl ether) is an antibacterial compound that has been used in consumer products for about 40 years. The tolerability and safety of triclosan has been evaluated in human volunteers with little indication of toxicity or sensitization. Although information in


LC MS Analysis of Triclosan Irgasan in Waste Water

Protocol for LC MS Analysis of Triclosan Irgasan in Waste Water

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