How do you pronounce 單質?

Q: How do you pronounce 單質? A: daan1 zat1, e.g.

單質 (daan1 zat1) — meaning, pronunciation, examples

單質 (daan1 zat1, dān zhì) — simple substance (consisting purely of one element, such as diamond)

單丁 (daan1 ding1) — one person; one who is alone
單人房 (daan1 jan4 fong2) — single room (hotel)
單企人 (daan1 kei5 jan4) — Chinese radical, which represents human, a single person side-radical
單位 (daan1 wai2) — (noun) apartment
單係 (daan1 hai6) — only (spoken)
單利 (daan1 lei6) — simple interest