Sigma-Aldrich

Sigma-Aldrich Products API

Product catalog search and retrieval for research chemicals, biochemicals, and laboratory supplies.

GitHub OpenAPI

Operations 3

GET /products/search Search Products #
GET /products/{catalogNumber} Get Product by Catalog Number #
GET /products/cas/{casNumber} Get Product by CAS Number #

Documentation

📖
Documentation
https://www.sigmaaldrich.com/US/en/technical-documents/technical-article/chemistry/labware/sigma-aldrich-developer-portal

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/sigma-aldrich/refs/heads/main/openapi/sigma-aldrich-products-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/sigma-aldrich/refs/heads/main/json-schema/sigma-aldrich-product-schema.json

Other Resources

🔗
SpectralRules
https://raw.githubusercontent.com/api-evangelist/sigma-aldrich/refs/heads/main/rules/sigma-aldrich-rules.yml
🔗
JSONLD
https://raw.githubusercontent.com/api-evangelist/sigma-aldrich/refs/heads/main/json-ld/sigma-aldrich-context.jsonld
🔗
Vocabulary
https://raw.githubusercontent.com/api-evangelist/sigma-aldrich/refs/heads/main/vocabulary/sigma-aldrich-vocabulary.yml

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OpenAPI Specification

sigma-aldrich-products-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Sigma-Aldrich Product Search Products API
  description: The Sigma-Aldrich Product Search API provides programmatic access to the Sigma-Aldrich product catalog — one of the largest collections of research chemicals, biochemicals, reagents, and laboratory supplies in the world.
  version: '1.0'
  contact:
    name: Sigma-Aldrich Customer Support
    url: https://www.sigmaaldrich.com/US/en/support/contact-us
  termsOfService: https://www.sigmaaldrich.com/US/en/terms-and-conditions
  license:
    name: Proprietary
    url: https://www.sigmaaldrich.com/US/en/terms-and-conditions
servers:
- url: https://api.sigmaaldrich.com/v1
  description: Sigma-Aldrich Production API
security:
- ApiKeyAuth: []
tags:
- name: Products
  description: Product catalog search and retrieval for research chemicals, biochemicals, and laboratory supplies.
paths:
  /products/search:
    get:
      operationId: searchProducts
      summary: Search Products
      description: Search the Sigma-Aldrich product catalog by keyword, product name, catalog number, CAS number, or chemical formula. Returns paginated product results with basic metadata.
      tags:
      - Products
      parameters:
      - name: q
        in: query
        required: true
        schema:
          type: string
        description: Search query (product name, catalog number, CAS number, or formula)
      - name: page
        in: query
        schema:
          type: integer
          default: 1
        description: Page number for pagination
      - name: pageSize
        in: query
        schema:
          type: integer
          default: 25
          maximum: 100
        description: Number of results per page
      - name: brand
        in: query
        schema:
          type: string
        description: Filter by brand (e.g., Sigma, Aldrich, Fluka, Supelco)
      - name: type
        in: query
        schema:
          type: string
          enum:
          - substance
          - kit
          - labware
          - reagent
        description: Filter by product type
      responses:
        '200':
          description: Product search results returned successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ProductSearchResults'
        '400':
          description: Invalid search parameters
        '401':
          description: Invalid or missing API key
        '429':
          description: Rate limit exceeded
  /products/{catalogNumber}:
    get:
      operationId: getProduct
      summary: Get Product by Catalog Number
      description: Returns detailed information for a specific product by its Sigma-Aldrich catalog number, including specifications, synonyms, physicochemical properties, safety data, and packaging options.
      tags:
      - Products
      parameters:
      - $ref: '#/components/parameters/catalogNumber'
      responses:
        '200':
          description: Product details returned successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Product'
        '401':
          description: Invalid or missing API key
        '404':
          description: Product not found
  /products/cas/{casNumber}:
    get:
      operationId: getProductByCas
      summary: Get Product by CAS Number
      description: Returns products matching a Chemical Abstracts Service (CAS) Registry Number. Multiple products may match a CAS number when a substance is available in different grades or formulations.
      tags:
      - Products
      parameters:
      - $ref: '#/components/parameters/casNumber'
      responses:
        '200':
          description: Products matching CAS number returned successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ProductSearchResults'
        '401':
          description: Invalid or missing API key
        '404':
          description: No products found for CAS number
components:
  parameters:
    catalogNumber:
      name: catalogNumber
      in: path
      required: true
      schema:
        type: string
      description: Sigma-Aldrich catalog number (e.g., A1048, M8159, CAS1234-56-7)
    casNumber:
      name: casNumber
      in: path
      required: true
      schema:
        type: string
        pattern: ^\d{1,7}-\d{2}-\d{1}$
      description: CAS Registry Number in standard format (e.g., 7732-18-5 for water)
  schemas:
    PackagingOption:
      type: object
      properties:
        packSize:
          type: string
          description: Package size (e.g., 100g, 500mL, 1kg)
        packagingType:
          type: string
          description: Container type (e.g., bottle, ampule, vial)
    ProductSearchResults:
      type: object
      properties:
        results:
          type: array
          items:
            $ref: '#/components/schemas/Product'
        total:
          type: integer
          description: Total number of matching products
        page:
          type: integer
        pageSize:
          type: integer
    Product:
      type: object
      properties:
        catalogNumber:
          type: string
          description: Sigma-Aldrich catalog number
        name:
          type: string
          description: Product name
        description:
          type: string
          description: Product description
        brand:
          type: string
          description: Sigma-Aldrich brand (Sigma, Aldrich, Fluka, Supelco)
        casNumber:
          type: string
          description: CAS Registry Number
        formula:
          type: string
          description: Molecular formula (e.g., C2H6O for ethanol)
        molecularWeight:
          type: number
          description: Molecular weight in g/mol
        smiles:
          type: string
          description: SMILES notation for the chemical structure
        inchi:
          type: string
          description: IUPAC International Chemical Identifier (InChI)
        purity:
          type: string
          description: Purity specification (e.g., ≥99.5%)
        grade:
          type: string
          description: Product grade (e.g., ACS reagent, BioReagent, HPLC Plus)
        synonyms:
          type: array
          items:
            type: string
          description: Alternative names for the product
        physicalState:
          type: string
          enum:
          - solid
          - liquid
          - gas
          description: Physical state at room temperature
        packagingOptions:
          type: array
          items:
            $ref: '#/components/schemas/PackagingOption'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: Sigma-Aldrich API key for authentication
externalDocs:
  description: Sigma-Aldrich Developer Portal
  url: https://www.sigmaaldrich.com/US/en/technical-documents/technical-article/chemistry/labware/sigma-aldrich-developer-portal