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This question already has an answer here:

Is it permitted to donate blood to blood banks in Islam?

Blood donation is different from blood tranfusion.

Is it allowed to donate blood to blood banks where the bloods are stored for future use?

marked as duplicate by goldPseudo May 24 '15 at 15:27

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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It is permissible - donating and receiving blood from/to muslims and non-muslims... see here and here.

Allah knows best.

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