poses : ▁ ▁The ▁resulting ▁nit ro gen ▁dio x ide ▁hydro ly zes ▁to ▁a ▁mixture ▁of ▁nit ric ▁and ▁nit r ous ▁ac ids : ▁ ▁Is ot ope ▁lab elling ▁ 1 5 N ▁▁ ▁In ▁organ ic ▁synth esis ▁is ot ope ▁en rich ed ▁sod ium ▁nit rite - 1 5 N ▁can ▁be ▁used ▁instead ▁of ▁normal ▁sod ium ▁nit rite ▁as ▁their ▁react ivity ▁is ▁nearly ▁identical ▁in ▁most ▁re actions . ▁ ▁The ▁obtained ▁products ▁carry ▁is ot ope ▁ 1 5 N ▁and ▁hence ▁N it ro gen ▁N MR ▁can ▁be ▁efficiently ▁carried ▁out . ▁ ▁References ▁ ▁Further ▁reading ▁ ▁External ▁links ▁▁▁ ▁International ▁Chem ical ▁Saf ety ▁Card ▁ 1 1 2 0 . ▁ ▁N it rite ▁in ▁Me at ▁ ▁Category : Ant id otes ▁Category : Color ▁fix ers ▁Category : Cor ros ion ▁in hib itors ▁Category : C uring ▁agents ▁Category : E - number ▁add it ives ▁Category : F ood ▁add it ives ▁Category : G arde ▁m anger ▁Category : N it rit es ▁Category : O x id izing ▁agents ▁Category : Pres erv atives ▁Category : S od ium ▁comp ounds ▁Category : World ▁Health ▁Organ ization ▁essential ▁medic ines <0x0A> </s> ▁Port rait ▁of ▁Do ña ▁Isabel ▁de ▁Re ques ens ▁y ▁En rí quez ▁de ▁Card ona - Ang les ola ▁is ▁an ▁oil ▁painting ▁dated ▁circa ▁ 1 5 1 8 ▁that ▁was ▁formerly ▁believed ▁to ▁dep ict