Have You Read a Good SDS Lately?
We use many chemicals, including adhesives, fillers, and paints, in the process of constructing our rockets. These materials often have associated safety hazards. A Material Safety Data Sheet (MSDS) was the “go to” document to identify the safety hazards. The MSDS was replaced by the Safety Data Sheet (SDS) starting in the early 2000s. SDSs have a 16-section format with signal words (Warning or Danger), standardized statements, and hazard pictograms.
As an example, I referenced the SDS for Bob Smith Industries (BSI) Cyanoacrylate Insta-Cure (referred to as CA below), a product commonly used for rocket construction. The section numbers and titles are standardized for all SDSs. Section 1 contains the product and company identification. Included with the contact information are phone numbers for the Poison Control Center and Transport Emergency as well as the company URL.
Section 2 is the Hazards Identification. This includes an Emergency Overview, Hazard Class description and Hazard Category numerical rating where 1 is the most severe and 4 is the least severe, Pictograms, and Precautionary Statements. The precautionary Statements identify Prevention, Response, Storage, and Disposal actions. The CA SDS identifies eye irritation with a warning in the Emergency Overview, has a Hazard Category of 2A for eye irritation, and shows a pictogram of an exclamation mark indicating an irritant.
Section 3 is titled Composition/Information on Ingredients. This section includes the Chemical Abstracts Service (CAS) Registry Number; this number is a universal system to identify chemical substances. This section may be important to some if allergies to included substances are suspected. Section 4 describes First Aid Measures with subtopics including Inhalation, Skin contact, Eye contact, Ingestion, Symptoms, and Notes to physician. Section 5 covers Fire Fighting Measures. Topics within this section are Extinguishing media, Special firefighting procedures, Unusual fire or explosion hazards, and Hazardous combustion products. Section 7 covers Handling and Storage. Section 8 is titled Exposure Controls/Personal Protection. This section identifies area ventilation, respiratory protections, eye/face protection, and skin protection. Section 10 identifies Stability and Reactivity including hazardous reactions, hazardous decomposition products, and incompatible materials. Conditions to avoid are also listed in this section.
Not all 16 sections may be applicable to the limited material quantities most hobby users might have. ections 6 (Accidental Release Measures), 9 (Physical and Chemical Properties), 11 (Toxicological Information), 12 (Ecological Information), 13 (Disposal Considerations), 14 (Transport Information), 15 (Regulatory Information), and 16 (Other Information) will typically not apply or they contain specialized information not useful to the layman.
Product labels are essentially abridged versions of an SDS. For individuals wanting more information on the chemical products they use, the Safety Committee recommendation is to download the SDSs for the products that you use and keep them in a notebook within your shop.
Stephen Lubliner
NAR Safety Committee Chairman