L-Leucine

L-Leucine

CAS No.: 61-90-5
Molecular Formula: C6H13NO2
Molecular Weight: 131.17
Phone :+8615650076306
WhatsApp :+8615650076306
Email :info2@junzhengchemical.com
Get a quote
product description

L-leucine is one of the eight essential amino acids, and belonging to the aliphatic amino acids within twenty kinds of proteins. L-leucine and L-isoleucine and L-valine are called three branched chain amino acids. L-leucineLeucine and D-leucine are enantiomers . It is a white shiny hexahedral crystal or white crystalline powder at room temperature , Odorless, slightly bitter .


Chemical Properties
PropertyValue

Melting point

>300 °C (lit.)

Alpha

15.4 º (c=4, 6N HCl)

Boiling point

122-134 °C(Press: 2-3 Torr)

Bulk density

300-400kg/m3

Density

1,293 g/cm3

Vapor pressure

<1 hPa (20 °C)

Refractive index

1.4630 (estimate)

FEMA

3297 | L-LEUCINE

Fp

145-148°C

Storage temp.

2-8°C

Solubility

1 M HCl: 50 mg/mL

Form

Powder

Pka

2.328(at 25℃)

Color

White to Off-white

Odor

at 100.00?%. odorless

PH

5.5-6.5 (20g/l, H2O, 20℃)

Biological source

Plant

Optical Rotation

[α]20/D +15.5°, c = 2 in 6 M HCl

Water Solubility

22.4 g/L (20 C)

λmax

λ: 260 nm Amax: 0.05λ: 280 nm Amax: 0.05

JECFA Number

1423

Sublimation

145-148 ºC

Merck

14,5451

BRN

1721722

Stability

Stability Moisture and light sensitive. Incompatible with strong oxidising agents.

LogP

0.80

CAS DataBase Reference

61-90-5(CAS DataBase Reference)

NIST Chemistry Reference

Leucine(61-90-5)

EPA Substance Registry System

L-Leucine (61-90-5)


Safety Information

PropertyValue

Safety Statements

24/25

WGK Germany

3

RTECS

OH2850000

TSCA

Yes

HS Code

29224995

Hazardous Substances Data

61-90-5(Hazardous Substances Data)


Product Usage

L-Leucine is an essential branched-chain amino acid (BCAA) that plays a critical role in protein synthesis and muscle repair. Its primary application is in the sports nutrition and dietary supplement industry, where it is hailed as the most potent activator of the mTOR signaling pathway, directly stimulating muscle protein synthesis for athletes and bodybuilders. In the pharmaceutical sector, L-Leucine is used as a key component in parenteral nutrition (IV drips) and for treating liver diseases and muscle wasting conditions. In infant formula, it is an indispensable additive to support healthy growth and metabolic development. Furthermore, it serves as a specialized lubricant in the tableting process for the pharmaceutical and food industries, and as a starting material for synthesizing various flavorings and biochemical reagents.

Factory Showcase
拼图_美图设计室-(1)
Quality Control Lab
实验室
Shipping And Transportation

Delivery Time

Inventory 2-3 working days New manufacturing 7-10 working days

Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
We only provide highest quality goods available, accompanied by after support!

拼图_美图设计室
Qualification Certificate
  • 微信图片_2026-04-09_153718_808
  • 微信图片_2026-04-09_153715_255
  • 微信图片_2026-04-09_153711_744
  • 微信图片_2026-04-09_153654_640
FAQ

Q1: Are Your Products Compliant With International Standards?

A1: Yes, our company holds a number of internationally recognized core certifications. All production and operation activities strictly follow international environmental, safety and quality standards, and each batch of products is accompanied by a compliance test report to meet the chemical industry requirements in different regions around the world.


Q2: Do You Provide Customized Product Services?
A2: Yes, we have a professional R&D team and refined production capacity. We can customize chemical products of different specifications and performances according to customers' specific needs, and provide full-process technical support to meet the personalized application needs of downstream industries.


Q3: What Is The Approximate Delivery Cycle Of The Products?
A3: The delivery cycle varies according to product type, order quantity and destination. We have a complete global supply chain system to ensure fast and safe delivery of goods. For specific cycle, you can consult our sales team for detailed information.


Q4: How To Obtain Product Samples?
A4: You can contact our customer service or sales team to specify the specific model and specification of the required samples. We will provide free samples according to the actual situation, and the sample express fee can be negotiated.

Contact Us
Submit
Recommendation