The hadith in the Musannaf come mainly from three people: Ma'mar Ibn Rashid (d. 153/770), Ibn Jurayj, and Sufyan al-Thawri. There are also relatively small numbers of hadith from Syfyan Ibn 'Uyayna, Abu Hanifa, and Malik Ibn Anas among a large number of other people. Most of them are said to have been compilers of hadith books in their own right.
An article by Harald Motzki appeared in the Journal of Near Eastern Studies that mentioned the Musannaf of `Abd al-Razzaq al-San`ani as a source of authentic ahadith of the first century AH. The conclusion of the author was, "While studying the Musannaf of `Abd al-Razzaq, I came to the conclusion that the theory championed by Goldziher, Schacht, and in their footsteps, many others - myself included - which in general, reject hadith literature as a historically reliable sources for the first century AH, deprives the historical study of early Islam of an important and a useful type of source.