# chemspider > Publicly sourced profile assembled by Optimly, in the Optimly AI Brand Index. Last refreshed 2026-10-04. - **Business Profile:** https://optimly.ai/brand/chemspider - **Dataset:** https://optimly.ai/brand/chemspider.json - **Markdown:** https://optimly.ai/brand/chemspider/llms.txt - **Official website:** https://chemspider.com - **Slug:** chemspider - **Categories:** data-analytics-business-intelligence, vertical-industry-software ## Overview - **Tagline:** Information unavailable due to website access error. Source: Brand's website (https://chemspider.com) · 2026-10-04 - **Description:** ChemSpider is a free chemical structure database providing rapid access to chemical information. However, the website is currently inaccessible, returning a 403 error. Source: Brand's website (https://chemspider.com) · 2026-10-04 ## Offerings - **Core capabilities:** Information unavailable due to website access error. Source: Brand's website (https://chemspider.com) · 2026-10-04 - **Pricing:** Information unavailable due to website access error. Source: Brand's website (https://chemspider.com) · 2026-10-04 ## Audience - **Target industry:** Information unavailable due to website access error. Source: Brand's website (https://chemspider.com) · 2026-10-04 ## Landscape - **Competitors:** - PubChem - ChEBI - SciFinder - Reaxys Source: Brand's website (https://chemspider.com) · 2026-10-04 Page last updated 2026-10-17.