Bromocresol purple

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Bromocresol purple,or 5',5"-dibromo-o-cresolsulfophthalein, is a pH indicator with the chemical formula C₂₁H₁₆Br₂O₅S.

Contents 1 Chemical properties 2 Uses 3 Health concerns 4 References 5 External links

[edit] Chemical properties

The compound, with a molecular weight of 540.24 u, is in a solid state at 25 °C and melts at 241 °C. Its CAS registry number is 115-40-2.

[edit] Uses

The primary use of Bromocresol purple is as a pH indicator; the most common solution is 0.04% aqueous.

Bromocresol purple (pH indicator)
below pH 5.2		above pH 6.8
5.2	↔	6.8

[edit] Health concerns

Bromocresol purple may cause irritation to the skin, eyes, and respiratory system.

[edit] References

• Material Safety Data Sheet from Oxford University

[edit] External links

• Links to external chemical sources