β-Hydroxyisovaleric acid

≥95.0% (T)

3-Hydroxy-3-methylbutyric acid
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
MDL number:
PubChem Substance ID:

Quality Level


≥95.0% (T)

refractive index

n20/D 1.4415 (lit.)


88 °C/1 mmHg (lit.)


−80 °C (lit.)


0.938 g/mL at 25 °C (lit.)

SMILES string




InChI key


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It is widely used in the synthesis of the anthrax tetrasaccharide and its analogs as anthrax vaccine candidates. β-hydroxyisovaleric acid can also be used in the synthesis of β-lactones by intramolecular dehydration condensation using 2-methyl-6-nitrobenzoic anhydride (MNBA).
β-Hydroxyisovaleric acid can be used as as a precursor for steroid alcohols.


1 g in glass bottle


Exclamation mark

Signal Word


Hazard Statements

Precautionary Statements

Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


UN 3334

WGK Germany


Flash Point(F)

235.4 °F - closed cup

Flash Point(C)

113 °C - closed cup

C Flummer et al.
Journal of animal science, 90 Suppl 4, 372-374 (2013-02-13)
This trial was conducted to investigate whether β-hydroxy β-methyl butyrate (HMB) supplementation during late gestation and throughout lactation would influence colostrum and milk production of sows and neonatal piglet survival (0 to 24 h). Control sows (CON; n = 8)...
Carlos Hermano da Justa Pinheiro et al.
European journal of applied physiology, 112(7), 2531-2537 (2011-11-15)
Beta-hydroxy-beta-methylbutyrate (HMB) is a metabolite derived from leucine. The anti-catabolic effect of HMB is well documented but its effect upon skeletal muscle strength and fatigue is still uncertain. In the present study, male Wistar rats were supplemented with HMB (320...
Shawn Portal et al.
European journal of applied physiology, 111(9), 2261-2269 (2011-02-18)
The use of ergogenic nutritional supplements is becoming inseparable from competitive sports. β-Hydroxy-β-Methylbutyric acid (HMB) has recently been suggested to promote fat-free mass (FFM) and strength gains during resistance training in adults. In this prospective randomized, double-blind, placebo-controlled study, we...
R Santer et al.
Molecular genetics and metabolism, 79(3), 160-166 (2003-07-12)
We report the clinical course and biochemical findings of a 10-year-old, mentally retarded girl with late-onset holocarboxylase synthetase (HCS, gene symbol HLCS) deficiency and only partial response to biotin. On treatment, even with an unusually high dose of 200mg/day, activities...
Total synthesis of antigen Bacillus anthracis tetrasaccharide?creation of an anthrax vaccine candidate.
Werz, Daniel B and Seeberger, Peter H
Angewandte Chemie (International Edition in English), 44(39), 6315-6318 (2005)

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