A Diels-Alder reaction between this compound and 1,3-butadiene produces dihydropyran.
A rotational transition of 4830 kilohertz in this molecule is used to detect it in this interstellar medium, where it is the first such organic compound detected. Quaternium-15 slowly releases this compound as it degrades, and mixing it with 18M sulfuric acid creates the Marquis reagent. A Diels-Alder reaction between this compound and 1,3-butadiene produces dihydropyran. In immune-precipitation experiments, it is used to crosslink amide groups on proteins (*) together. At maximum saturation it creates a 37% by mass solution when dissolved in water, and it can be synthesized by oxidation of methanol. For 10 points, identify this simplest aldehyde, which is often used to preserve dead bodies.
A rotational transition of 4830 kilohertz in this molecule is used to detect it in this interstellar medium, where it is the first such organic compound detected.
formaldehyde [or methanal]