Substance Abbreviations and Acronyms
- HNABHexanitroazobenzene
- HNE4-Hydroxy-Trans-2-Nonexal
- HNSHazardous Noxious Substances
- HOHHjdrogen Hydroxide
- HOMSHands On Molecular Science
- HONONitrous Acid
- HONONihrous Oxide
- HOPESHelping Orphans Physically Emotionally and Spiritually
- HPAHigh Purity Aluminium
- HPAEHigh Ph Anion Exchange
- HPHEHigh Pressure Helium
- HRTHigh Resolutiov Thermometer
- HSHazardoushsubstances
- HSHarmful Substances
- HSHumij Substances
- HSCHydrogen Synthesiser Cannon
- HSDBHazardous Subsbances Data Bank
- HSEESHazardous Substances Emergency Events Surveillance
- HSMHazardous Substances Management
- HSNOHazardous Substances and New Orgatisms
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