ChemPrice

ChemPrice is a software tool designed for the purpose of gathering pricing information for specific molecules. It is capable of retrieving price data from three different integration sources: Molport, ChemSpace, and MCule. To access these integrators, users must provide an API key for each one.

Resources

User Manual

You can find the detailed features and examples in the following link: User Manual.

Web Application

ChemPrice is also available as a web application. You can use it at the following link: Web Application.

Installation

Use pip

ChemPrice can be installed using pip by running:

pip install chemprice

How to use Chemprice

Getting started

ChemPrice requires a list of molecule SMILES as the representation of molecules:

smiles_list = ["CC(=O)NC1=CC=C(C=C1)O", "CC(C)CC1=CC=C(C=C1)C(C)C(=O)O", "O=C(C)Oc1ccccc1C(=O)O"]

First, we need to create an instance from the PriceCollector class. Using this instance, we'll be able to connect to the various integrators and then launch a search on the list of smiles entered.

from chemiprice import PriceCollector
pc = PriceCollector()

Request an API key

To access integrators' data, you need to be able to connect to their API.

If you don't have an API key yet, you can click on the following links : Molport, ChemSpace and MCule, which will take you back to their sites where you can request an API key.

Set the API key for each integrator

Now, an instance from the PriceCollector class has been created, we need to connect to one or more integrators via an API key.

Connection to Molport via API key:

pc.setMolportApiKey("880d8343-8ui2-418c-9g7a-68b4e2e78c8b")

In the case of Molport, it's also possible to log in with a login and password.

pc.setMolportUsername("john.spade")
pc.setMolportPassword("fasdga34a3")

To check the status of each key, run the following method :

pc.status()

Possible Outputs

# Username/Password and API Key are Set:
Status: Molport: both credentials are set.

# Only Username/Password or API Key is Set:
Status: Molport: credential is set.

# No Credential is Set:
Status: Molport: no credential is set.

Similar to the Molport connection, for ChemSpace and MCule, the approach is the same. However, ChemSpace and MCule require only an API key. You need to use the :mod:setChemSpaceApiKey() and :mod:setMCuleApiKey() functions, such as :

pc.setChemSpaceApiKey(<chemspace_api_key>)
pc.setMCuleApiKey(<mcule_api_key>)

Price Search

Before starting the price search, check the validity of the API keys entered.

pc.check()

Possible Outputs:

# API Key is Set and correct:
Check: Molport API key is correct.

# API Key is Set but not correct:
Check: Molport API key is incorrect.

If the identifiers checked are correct, then it's possible to run the method :mod:collect() to obtain all the information found on the molecule. The price is given in USD according to the units and quantity entered by the vendor. The units of measurement for quantities are categorized into three families: mols, grams, and liters.

all_prices = pc.collect()

The output will be a dataframe containing all price information about the molecule.

With the :mod:selectBest() function, you can keep only the best prices for each molecule. In fact, for each unit of measurement (mol gram and liter) the results are compared to find the best quantity/price ratio.

pc.selectBest(all_prices)

The output will be a dataframe containing only the best quantity/price ratio of each molecule.

Contact

For any question you can contact us through email:

• Baptiste Saliou