What is the pKa of 4-nitrophenol?

Structure for HMDB0001232 (4-Nitrophenol)

Is 4-nitrophenol a strong acid?

Both the nitrophenols are weak acids compared to carboxylic acids, but the nitro substitution makes them both stronger acids than phenol. 2-Nitrophenol is volatile in steam, but 4-nitrophenol is not. The nitro group can be reduced to the amino group under strong reducing conditions.

Is 4-nitrophenol basic or acidic?

4-nitrophenol is more acidic than phenol. In 4-nitrophenol nitro group has strong electron withdrawing resonance (-R) effect as well as electron withdrawing inductive (-I) effect. Due to these two effects the polarity of O-H bond of phenolic -OH group increases.

Is 4-nitrophenol a weak acid?

The weak acid 4-nitrophenol (NP) experiences a large (ca.

The pKa of 4-nitrophenol is 7.15 (3), indicating that this compound will partially exist in the ionized form in water and moist soils and the anion will not volatilize (SRC). 4-Nitrophenol is not expected to volatilize from dry soil surfaces (SRC) based upon a vapor pressure of 9.79X10-5 mm Hg at 20 deg C (4).

What kind of acid is 4-Nitrophenyl acetic acid?

(4-nitrophenyl)acetic acid is a member of the class of phenylacetic acids that is phenylacetic acid in which the phenyl grup is substituted at the para- position by a nitro group. It is a C-nitro compound and a member of phenylacetic acids.

How is 4-nitrophenol used as a pH indicator?

4-Nitrophenol can be used as a pH indicator. A solution of 4-nitrophenol appears colorless below pH 5.4 and yellow above pH 7.5. This color-changing property makes this compound useful as a pH indicator.

What is the molecular weight of 4-nitrophenolate?

14609-74-6. p-nitrophenolate ion. More… Molecular Weight. 138.1 g/mol. Parent Compound. CID 980 (4-Nitrophenol) Date s. Modify.