AC166250000, AC166250250, AC166250500, AC166251000, AC166252500, Keep, Replace your shopping cart with these items? Incompatible with bases and air. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Cesium in particular explodes on contact with water. "Pamphlet produced by the City of Milwaukee summarizing NFPA 704 code requirements" (PDF). There are, surprisingly (except to most organic chemists), even more dangerous compounds in the average organic chemistry lab. Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water (e.g. email:, Specialty/Bulk Sales Prolonged exposure may cause liver, kidney, and heart "NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response" is a standard maintained by the U.S.-based National Fire Protection Association. However it's not an oxidizer. Qinbo Wang; Haibo Xu and Xi Li. Get medical advice/attention if you feel unwell. Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. Very short exposure could cause death or major residual injury (e.g. Causes respiratory tract irritation. This section briefly explains the NFPA system. May cause damage to organs through prolonged or repeated exposure. Anyway, source? Admittedly these are all chemical elements, and the properties of a single element is no guarantee on it's action as part of a compound. !��v� mU>m�2��y�œ|�{�����Ʒ�3|~IGA$���#�_���� z'-9H�o�l"7/2� I can't find NFPA data on straight diazomethane (which may be because nobody in their right mind ever works with the stuff in its pure gaseous form; it's always used in a dilute diethyl ether solution, and even then is never sold or shipped that way) but it would probably be a finalist, as the gas is acutely toxic, autoignites at room temperature, and detonates on standing (something for everyone!). Does learning the same spell from different sources allow it to benefit from bonuses from all sources? Mercury's fairly toxic on its own, but not all that "bioavailable" since the human body doesn't need any so it doesn't have any biochemical system to take it in. NIOSH rates pentaborane 4-4-2, no W noted, Feature Preview: New Review Suspensions Mod UX, Creating new Help Center documents for Review queues: Project overview.   May be absorbed through the skin in T-BuLi is a 3-3-4. Inhalation of high concentrations may cause central nervous system May cause severe skin irritation with possible Let ACS help you navigate your career journey with tools, personal coaching and networking. EC Number 209-084-5. MSDS Name: Chloroform-D IF ON SKIN: Wash with plenty of soap and water. Light [2], Globally Harmonized System of Classification and Labelling of Chemicals, "Proposed Amendments on Revisions to the Recommended System for the Identification of The Fire Hazards of Materials / NFPA No. The closest I can find is trimethylaluminum, at a 3-4-3 (heath-fire-reactivity). It seems that diborane (see answer by feetwet) is the only compound rated with H4 F4 R4 code by NIOSH, though there are two substances lacking just a single point to join a 4-4-4-club: Now I'm no chemist (I'm actually a biologist, with a science addiction) But as far as flammability and reactivity especially with water, I would assume some of the alkali metals, especially the heavier ones. ChEBI. May cause respiratory irritation. MDL number MFCD00007346.   MDL number MFCD00007346. A lot of the organometallics are rather... interesting compounds to work with. Methenyl Trichloride-D; Methyl Trichloride-D; Trichlormethan-D; Nice example of 3c2e bonding though. May cause liver damage. Skin: Tel: 1-800-343-0660 or 1-978-521-6300 It was not designed to notify the user of the hazards of chemicals in the laboratory setting. email: Wear protective gloves/protective clothing/eye protection/face protection. endobj Normally stable, but can become unstable at elevated temperatures and pressures (e.g. Launch and grow your career with career services and resources. <>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S>> These hazard codes are not part of the NFPA 704 standard, but are occasionally used in an unofficial manner. Continue rinsing. When leads me to wonder, because I wonder about these things from the safety of my office chair in a completely unrelated field; just how bad can it get? Is there any substance that's a 4-4-4 on the NFPA diamond? Dispose of contents/ container to an approved waste disposal plant, Catalog Sales & Customer Service Causes irritation of the mucous membrane and upper respiratory and coma. Terms of Use, Keep your current shopping and add the saved Cart? Hydrazine is also 4-4-3. Materials that require considerable preheating, under all ambient temperature conditions, before ignition and combustion can occur (e.g. Now offered virtually. Beilstein/REAXYS Number 386796 . Emergency Number: 201-796-7100 or 1-978-521-6350