Chemistry Abbreviations Starting with the Letters N and O

Abbreviations and Acronyms Used in Chemistry

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By
Anne Marie Helmenstine, Ph.D.
Anne Marie Helmenstine, Ph.D.
Chemistry Expert
  • Ph.D., Biomedical Sciences, University of Tennessee at Knoxville
  • B.A., Physics and Mathematics, Hastings College
Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels.
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Updated on July 26, 2018

Chemistry abbreviations and acronyms are common in all fields of science. This collection offers common abbreviations and acronyms beginning with the letters N and O used in chemistry and chemical engineering.

Chemistry Abbreviations Starting With N

n - nano
n - neutron
n0 - neutron
n - neutron emission
N - Newton
N - Nitrogen
N - Normal (concentration)
n - number of moles
NA - Avogadro constant
NA - Not Active
NA - Nucleic Acid
Na - Sodium
NAA - N-AcetylasPartate
NAA - Naphtalic Acetic Acid
NAC - Naphthenic Acid Corrosion
NAD+ - Nicotinamide Adenine Dinucleotide
NADH - Nicotinamide Adenine Dinucleotide - Hydrogen (reduced)
NADP - Nicotinamide Adenine Dinucleotide Phosphate
NAS - National Academy of Science
Nb - Niobium
NBC - Nuclear, Biological, Chemical
NBO - Natural Bond Orbital
NCE - New Chemical Entity
NCEL - New Chemical Exposure Limit
NCR - No Carbon Required
NCW - National Chemistry Week
Nd - Neodymium
Ne - Neon
NE - Non Equilibrium
NE - Nuclear Energy
NG - Natural Gas
NHE - Normalized Hydrogen Electrode
Ni - Nickel
NIH - National Institutes of Health
NiMH - Nickel Metal Halide
NIST - National Institute of Standards and Technology nm - nanometer
NM - Non Metal
NMR - Nuclear Magnetic Resonance
NNK - Nicotine-derived Nitrosamine Ketone
No - Nobelium
NOAA - National Oceanic and Atmospheric Administration
NORM - Naturally Occurring Radioactive Material
NOS - Nitrous Oxide
NOS - Nitric Oxide Synthase
Np - Neptunium
NR - Not Recorded
NS - Not Significant
NU - Natural Uranium
NV - Non-Volatile
NVC - Non-Volatile Chemical
NVOC - Non--Volatile Organic Chemical
NW - Nuclear Weapon

Chemistry Abbreviations Starting With O

O - Oxygen
O3 - Ozone
OA - Oleic Acid
OAA - OxaloAcetic Acid
OAc - Acetoxy functional group
OAM - Orbital Angular Momentum
OB - Oligosaccharide Binding
OC - Organic Carbon
OD - Optical Density
OD - Oxygen Demand
ODC - Ornithine DeCarboxylase
OER - Oxygen Enhancement Ratio
OF - Oxygen Free
OFC - Oxygen Free Copper
OFHC - Oxygen Free High thermal Conductivity
OH - alcohol
OH - hydroxide
OH - hydroxyl functional group
OI - Oxygen Index
OILRIG - Oxygen Is Losing - Reduction Is Gaining
OM - Organic Matter
ON - Oxidation Number
OP - Organophosphate
OQS - Occupied Quantum State
OR - Oxidation-Reduction
ORNL - Oak Ridge National Laboratory
ORP - Oxidation-Reduction Potential
ORR - Oxidation-Reduction Reaction
Os - Osmium
OSHA - Occupational Safety and Health Administration
OSL - Optically Stimulated Luminescence
OTA - OchraToxin A
OV - Organic Vapor
OVA - Organic Vapor Analyser
OVA - OVAlbumin
OWC - Oil-Water Contact
OX - Oxygen
OX - Oxidation
OXA - OXanilic Acid
OXT - OXyTocin
OXY - Oxygen

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Helmenstine, Anne Marie, Ph.D. "Chemistry Abbreviations Starting with the Letters N and O." ThoughtCo, Aug. 27, 2020, thoughtco.com/chemistry-abbreviations-starting-with-n-and-o-603464. Helmenstine, Anne Marie, Ph.D. (2020, August 27). Chemistry Abbreviations Starting with the Letters N and O. Retrieved from https://www.thoughtco.com/chemistry-abbreviations-starting-with-n-and-o-603464 Helmenstine, Anne Marie, Ph.D. "Chemistry Abbreviations Starting with the Letters N and O." ThoughtCo. https://www.thoughtco.com/chemistry-abbreviations-starting-with-n-and-o-603464 (accessed June 4, 2023).