What is the Ka of maleic acid?

E5: Acid Dissociation Constants of Organics

Compound Conjugate Acid Ka
lysine (μ = 0.1 M) 9.1×10–3 8.3×10–10 2.0×10–11
maleic acid 9.1×10–3 9.1×10–3
malic acid 9.1×10–3 9.1×10–3
malonic acid HOOCCH2COOH 9.1×10–3 9.1×10–3

What is the formula of maleic acid?

Maleic acid/Formula

What are the pKa values of maleic acid?


Property Value Source
melting point (°C) 130.5 °C PhysProp
water solubility 4.41E+005 mg/L (at 25 °C) YALKOWSKY,SH & DANNENFELSER,RM (1992)
logP -0.48 SANGSTER (1994)
pKa 1.83 LIDE,DR (1996)

What is the configuration of fumaric acid?

Fumaric acid is a butenedioic acid in which the C=C double bond has E geometry. It is an intermediate metabolite in the citric acid cycle. It has a role as a food acidity regulator and a fundamental metabolite. It is a conjugate acid of a fumarate(1-).

What does maleic acid smell like?

Chemical Properties Maleic acid occurs as a white crystalline (monoclinic) powder and possesses a faint acidulous odor and an astringent taste.

Is maleic acid a strong acid?

Maleic acid is a weak diprotic acid that can dissociate stepwise as shown in equations (1) and (2). As the acid is titrated with strong base, the pH changes in a characteristic way giving rise to a 2-step titration curve.

Is fumaric acid bad for you?

* Fumaric Acid can affect you when breathed in. * Contact can irritate and burn the skin and eyes. * Breathing Fumaric Acid can irritate the nose and throat causing coughing and wheezing. * Fumaric Acid may damage the kidneys.

Which acid is present in honey?

gluconic acid
The major organic acid is gluconic acid. Gluconic acid is produced in honey by the action of the enzyme glucose-oxidase on glucose. The organic acids present in honey are significant because they interact with other flavors. Gluconic acid has flavor-enhancing properties.

Is maleic acid harmful?

* Maleic Acid can affect you when breathed in and by passing through your skin. * Contact can severely irritate and burn the skin and eyes with possible eye damage. * Breathing Maleic Acid can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath.

Is hydrofluoric acid a strong acid?

In liquid anhydrous HF, self-ionization occurs: 3 HF ⇌ H 2 F + + HF − 2 Even though it is highly corrosive, hydrofluoric acid is not considered to be a strong acid because it does not completely dissociate in water. Both enthalpy and entropy conspire to reduce the acidity of H-F. Strong acids are defined by their pKa.

What kind of acid is cis butenedioic acid?

CAS NO. EINECS NO. MOL WT. Maleic acid (also called cis-butenedioic acid), a white crystals easily soluble in water, acetone, and alcohol, is an unsaturated organic dibasic acid which carboxylic acid groups are next to each other in the cis form.

Which is more stable cis or maleic acid?

The cis isomer is the less stable. Maleic acid is used in the preparation of fumaric acid by catalytic isomerization. and other chemical products as a carboxylating agent. It is used as an oil and fat preservative and food acidulant. UN NO.

What is the chemical formula for 2-butenedioic acid?

2-Butenedioic acid (2Z)-, polymer with sodium 2-propene-1-sulfonate. PubChem CID. 23685774. Structure. Find Similar Structures. Chemical Safety. Laboratory Chemical Safety Summary (LCSS) Datasheet. Molecular Formula. C7H9NaO7S.

What should be the concentration of butenedioic acid in dishwashing water?

For use at a concentration not to exceed 40 ppm in the final rinse water of commercial dishwashing machines. According to Section 409 (h) (1) (C) of the Federal Food, Drug, and Cosmetic Act, food contact substance notifications (FCNs) are effective only for the listed manufacturer and its customers.