Is Wudhu without Istinjah Valid?
بسم الله الرحمن الرحيم
Wudhu is a specific action which entails the washing of specific limbs and wiping of the head. Wudhu removes minor internal impurities. Whereas Istinjah entails the removal of major physical impurities emitted from the private parts. Each of these methods of cleaning is independent. A person can be in a state of ritual internal impurity and at the same time his body or clothes may be contaminated with physical impurities. Similarly, a person may not have any physical impurities on his clothes or body but at the same time be in a state of ritual internal impurity.
Therefore, if a person, after urinating or defecating did not perform Istinjah [for whatever reason] thereafter, performed Wudhu, then his wudhu will be valid. However, it will incumbent upon him to remove all impurities from his body (i.e. perform Istinjah) before performing Salah.
And Allah Ta’āla Knows Best
Mufti Kaleem Muhammad
Darul Iftaa, Jaamia Madinatul Uloom (Trinidad)
This answer was collected from Fatwa-tt.com, which is operated by the Darul Iftaa of Jaamia Madinatul Uloom (Trinidad and Tobago) under the advice and guidance of Mufti Ebrahim Desai (Daamat Barakaatuhum) of South Africa.