Responsible Care is a voluntary code of conduct developed, enforced, and monitored by the Chemical Manufacturers Association. Voluntary codes could be designed and enforced by regulators, nonprofit groups, industry associations, and individual firms. They could vary in their scope, focusing on firms around the globe, in a given region, within a country, or in a given industry. This article focuses on Responsible Care’s self-regulatory services that pertain to establishing, monitoring, and enforcing industry-wide environmental, health, and safety standards. Employing insights from the club theory, stakeholder theory, institutionalist theory, and the corporate social performance perspective, it examines the demand and supply sides of voluntary codes. Finally, it discusses theoretical implications and the key challenges faced by Responsible Care in the future.