API standards
Clinivex supplies API reference standards for laboratories working with active pharmaceutical ingredients across pharmaceutical analysis, quality control, and research. A reliable reference standard gives your laboratory a known point of comparison when identifying, testing, or validating methods against a specific API – an essential requirement wherever analytical accuracy and consistency matter. Browse the available API reference standards below, or contact our team to check availability for a specific compound.
Showing 1–16 of 5984 results
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![(-)-[N-[(R)-Tetrahydrofurfuryl]noroxymorphone Hydrochloride](https://www.clinivex.com/wp-content/uploads/watermarked/350546-full.jpg?v=1792392694)
(-)-[N-[(R)-Tetrahydrofurfuryl]noroxymorphone Hydrochloride
CAS Number: 62509-10-8
Molecular Formula: C21H25NO5 • HCl
Catalogue Number: RCLS1T1084997
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(-)-5-epi CP 55,940
CAS Number: 2365471-91-4
Molecular Formula: C24 H40 O3
Catalogue Number: RCLS1T1024910
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(-)-Carbovir
CAS Number: 120443-30-3
Molecular Formula: C11 H13 N5 O2
Catalogue Number: RCLS2L118352
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(-)-cis-Pentazocine
CAS Number: 7488-49-5
Molecular Formula: C19 H27 N O
Catalogue Number: RCLS1T1074433
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(-)-cis-Pentazocine N-Oxide
CAS Number: N/A
Molecular Formula: C19H27NO2
Catalogue Number: RCLS1T1074440
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(-)-Huperzine A-d6 (Major)
CAS Number: N/A
Molecular Formula: C15 H11 D7 N2 O
Catalogue Number: RCLS2L150472
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(-)-Inosine-1',2',3',4',5'-13C5
CAS Number: N/A
Molecular Formula: C513C5H12N4O5
Catalogue Number: RCLS2L154384
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(-)-Nicotine Ditartrate
CAS Number: 65-31-6
Molecular Formula: C10 H14 N2 . 2 C4 H6 O6
Catalogue Number: RCLS2L168289
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(-)-Pentazocine Hydrate
CAS Number: N/A
Molecular Formula: C19 H29 N O2
Catalogue Number: RCLS1T1074436
What Are API Reference Standards Used For?
API reference standards are commonly used to confirm the identity of an active pharmaceutical ingredient, support assay and quantitative analysis, and assist with analytical method development and validation. They can also play a role in purity or related-substance assessment, helping laboratories evaluate a drug substance against a known reference point. Depending on the specific standard and analytical workflow, API reference standards may support pharmaceutical research and development, quality control testing, or comparative analysis. Not every application applies to every product – the appropriate use depends on the specific API and the analytical method being followed.
Types of API Reference Standards
API reference standards can serve different roles depending on how they’re used in a laboratory’s analytical workflow. Some are used as primary points of reference for a given API, while others function as secondary or working standards calibrated against a primary reference for day-to-day testing. Related-compound or impurity standards may also be relevant where a method requires evaluating substances associated with the main API. The specific classification and role of a given standard depends on the product and its intended analytical use – we’d recommend reviewing the individual listings below or contacting our team to confirm which classification applies to a compound you’re interested in.
How to Choose the Right API Reference Standard
Selecting an appropriate API reference standard depends on the intended analytical purpose, the target API, the analytical workflow in use, and any applicable laboratory or regulatory requirements. A few points worth considering:
- Define the Analytical Purpose – Identify whether the standard is intended for identification, assay, method development, validation, or another analytical requirement.
- Confirm the Target API – Ensure the reference standard corresponds to the exact API being evaluated in your method.
- Review Available Documentation – Check the documentation and quality information provided for the specific reference standard before use.
- Consider the Analytical Workflow – Confirm the standard fits your laboratory’s intended analytical approach and equipment.
- Check Applicable Requirements – Consider relevant laboratory, pharmacopoeial, or regulatory requirements that may apply to your work.
why Choose Clinivex?
At Clinivex, we earn trust by delivering impeccable service, expert guidance, and reliable solutions that drive long-term success. With a skilled team and customer-first approach, we stand as a leading pharmaceutical reference standards supplier in the USA and Canada.
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Frequently Asked Questions
A reference standard typically serves as a primary point of comparison for an API, while a working standard is calibrated against a reference standard for routine day-to-day testing.
Traceability helps confirm that a standard’s assigned values are linked back to a recognized reference point, supporting confidence in analytical results over time.
This can apply in workflows where a method needs to evaluate not only the API itself but also substances related to it, such as during purity or related-substance testing.
Factors can include the intended analytical purpose, the specific API involved, the documentation available, and the requirements of the method or workflow being used.
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