AHCES Blog

  What is Clove Oil? Clove Oil, sometimes written as Oil of Clove, is an essential oil derived from the clove plant, S. aromaticum. The primary active component of clove oil is the compound eugenol, an aromatic compound of the phenylpropene group. Per the PubChem database, clove oil also contains the aromatic compounds benzaldehyde, methyl salicylate, and eugenol acetate, as well as caryophyllene, ylangene, and 2-heptanone. This guide will primarily focus on the hazards of the eugenol component. Clove Oil has the CAS Number 800-34-8. Eugenol has the CAS Number 97-53-0. When searching for clove oil in the component list of a safety document, such as a Chemical Label or a Safety Data Sheet, look for either of these CAS numbers. Notable Properties of Clove Oil At room temperature, clove oil is a liquid. It can either be clear or will have a pale yellow coloration. Over time with exposure to oxygen or UV, it can discolor to a darker brown color. To limit discoloration, store clove oil ...

  What is a DOT Limited Quantity? The formal definition of a Limited Quantity from the Pipeline and Hazardous Materials Administration (PHMSA) is as follows: Limited quantity, when specified as such in a section applicable to a particular material, means the maximum amount of a hazardous material for which there is a specific labeling or packaging exception. 49 CFR 171.8 “Limited quantity” In simpler terms, a limited quantity in an amount of hazardous material small enough to be less hazardous and therefore requires less stringent packaging and labeling compared to other hazardous shipments. What Exceptions are made for Limited Quantity Shipments? The full text describing exceptions to the shipping rules for limited quantity materials can be found in  49 CFR Part 173.156 . In addition to the exceptions listed in the linked text, there are other exceptions within Part 173 pertaining to more specific exceptions by hazard class and transportation method. Gross We...

  Definition of DOT Class 9: Miscellaneous Hazardous Materials Class 9 covers materials which are hazardous for transportation but do not otherwise fall into the Class 1 to Class 8 classifications. Class 9 materials include anesthetic, noxious, or other similar materials which could inhibit the performance of a flight crew member if released. They also include elevated temperature materials, hazardous substances, hazardous waste, and marine pollutants that meet a definition within 49 CFR 171.8 but not a specific Class definition. Relationship Between Class 9 and OSHA Hazard Classifications Since Class 9 is strongly defined more by the material's properties being hazardous in transportation, there is minimal overlap with OSHA Hazard Classification. OSHA has separate Hazards Not Otherwise Classified apart from Physical Hazards and Health Hazards. While PHMSA Class 9 includes materials which are considered elevated temperature material and marine pollutants,...