Crossword clues for Laboratory substances. 4 lettersAnswerClueAGARLaboratory substance.SERALaboratory substances.ACIDLaboratory substance.SERUMLaboratory substance.REAGENTLaboratory substance.ESTERLaboratory substance.CHEMICALLaboratory substanceGASESLaboratory substances.ACIDSLaboratory substances.SUBLIMATEPurify (a substance) by laboratory process.MEDIASubstances used for laboratory cultures.