Chemistry Abbreviations Starting with the Letter R

Abbreviations and Acronyms Used in Chemistry

Radon (Chemical Element)
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Chemistry abbreviations and acronyms are common in all fields of science. This collection offers common abbreviations and acronyms beginning with the letter R used in chemistry and chemical engineering.

°R - degrees Rankine
R - Arginine amino acid
R - Chiral center for R/S system
R - functional group or side chain of atoms variable
R - Resistance
R - Ideal Gas Constant
R - Reactive
R - Redux
R - Röntgen unit
R - Rydberg Constant
R-# - Refrigerant number
Ra - Radium
RA - Retinoic Acid
RACHEL - Remote Acess Chemical Hazards Electronic Library
rad - radian
rad - Radiation - Absorbed Dose
Rad - Radioactive
Rb - Rubidium
RBA - Rutherford Backscattering Analysis
RBD - Refined, Bleached and Deodorized
RCS - Reactive Chemical Species
RDA - Recommended Daily Allowance
RDT - Recombinant DNA Technology
RDX - cyclotrimethylenetrinitramine
RDX - Research Department Explosive
RE - Rare Earth
Re - Rhenium
REACH - Registration, Evaluation, Authorization and restriction of Chemical substances
REE - Rare Earth Element
Ref - Reference
rem - Radiation Equivalent - Man
REM - Rare Earth Metal
REQ - Required
RER - Respiratory Exchange Ratio
RF - Radio Frequency
RF - Resonance Frequency
Rf - Rutherfordium
RFIC - Reagent-Free Ion Chromatography
RFM - Relative Formula Mass
RG - Rare Gas
Rg - Roentgenium
RH - Relative Humidity
Rh - Rhodium
RH - Rydberg Constant for Hydrogen
RHE - Reversible Hydrogen Electrode
RHIC - Relativistic Heavy Ion Collider
RHS - Right Hand Side
RI - Radical Initiator
RIO - Red IronOxide
RL - Reaction Level
RMM - Relative Molar Mass
RMS - Root Mean Square
Rn - Radon
RNA - RiboNucleic Acid
RNS - Reactive Nitrogen Species
RO - Red Oxide
RO - Reverse Osmosis
ROHS - Restriction Of Hazardous Substances
ROS - Reactive Oxygen Species
ROWPU - Reverse Osmosis Water Purification Unit
RPM - Revolutions Per Minute
RPT - Repeat
RSC - Royal Society of Chemistry
RT - Reverse Transcriptase
RT - Room Temperature
RT - Energy (Rydberg Constant x Temperature)
RTP - Room Temperature and Pressure
RTM - Read The Manual
RTSC - Room Temperature Super Conductor
Ru - Ruthenium