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Most Professional Factory Supply High Quality 99% N-L-leucyl-L-leucine CAS 3303-31-9

2 Inquiries

Unit Price:

$1/G FOB

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CAS No.:

3303-31-9

Grade:

Pharmaceutical Grade

Content:

99%

Port:

Packaging:

10g/bag 100g/bag

Sample Available:

Yes

Price valid (until):

2026-11-14

Contact Supplier

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Shandong Zikang Biotechnology Co., Ltd.

Company Type:

Trader

Location:

China

Payment Terms:

TT against copy of documents,D/P,L/C,D/A,O/A,TT against B/L draft before shipment,100% TT in advance

Qualification:

Main Products:

Weight Loss Peptide,Anti Aging Peptide,Nootropic,Pharmaceutical Intermediates,Cosmetic raw material,API

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Product Description
Seller Information
Inquiry History

Description

Product Detail

L-leucine dipeptide is a Leu derivative and a type of dipeptide.

1、Faster Absorption: Leucine dipeptide is actively absorbed via the PEPT1 transporter in the intestines, with an absorption rate 185% higher than conventional leucine.

2、Higher Bioavailability: The human body has specific dipeptide uptake transporters, making oral dipeptides more efficiently absorbed than individual amino acids. Some leucine dipeptides can survive digestive enzyme breakdown and be absorbed in their intact form.

3、Metabolic Mechanism: Leucine dipeptide can activate the mTOR pathway, which acts as a critical signaling switch to initiate protein translation and muscle growth.

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Product name:	H-LEU-LEU-OH / L-Leucyl-L-leucine
CAS Number	3303-31-9
Purity	99%
Appearance	white powder
Grade	High purity Medical Grade
Package	1kg/bag or 25kg/drum，according your inquiry
Storage	Preserve in tight containers,in a cool and dry place

Our Company

Shandong Zikang Biotechnology Co., Ltd. is a high-quality manufacturer of chemical raw materials located in Shandong, China. The company mainly deals in fine chemicals and chemical raw materials, with its products sold far to multiple regions including South America, Europe, Southeast Asia and the Middle East. We can provide customized product services for customers. Focused on the production of pharmaceutical intermediates, the company has obtained multiple system certifications. It owns production teams and testing laboratories within Shandong Province. By partnering with our company, you will gain access to premium products, efficient and reliable logistics distribution, and timely after-sales service.
We are committed to building long-term cooperative relationships with clients, and our business philosophy lies in win-win cooperation, integrity and transparency. Equipped with professional sales and production teams, the company is capable of meeting clients' personalized customized demands.

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Packing&Delivery&Shipping

Packing:

1. Weight <1kg ---- Fluorinated bottle

2. 25kg ---- Plastic bucket

3. 180- 200kg ---- Drum

P.S.: we accept packaging customization.

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Delivery:

We have large quantity raw powder in stock, normally could ship out within 3 working days.

For rush delivery, please contact our sales team for particular arrangement.

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Shipping:

We ship goods via DHL, Fedex, UPS, TNT, China post, NL Post and other couriers, weight from 10g to 1000kg or even bulker.

Shipping details & shipping documents will be provided and sent to customers as long as it is ready.

We keep tracking the shippment until clients well received.

After years export shipping experience, with professional and experienced cooperated forwarders, we ensure that goods can be delivered in multiple ways safetly and efficiently.

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FAQ

Q1: When will the product be shipped after payment?

---We are committed to the same day shipping.

Q2. How does your factory control quality?

All the raw material purchasing and production quality control are strictly following the ISO9001: 2008 management system. Besides, the full-featured detection equipment and GMP quality management system provided the strongest guarantee for a high-quality product.

Q3: How long will it take to receive the parcel?

--3 days for the US market; 4-6 days for the others.

Q4: What can I do if I don't have the ability to clear the custom?

--We got experience after doing export for many years, so don't worry we can handle that.

Q5: What about after-sale service?

---We promise to reissue free of charge if there is any problem.

If you want to order online,please contact us.

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ECHEMI Editorial Reference

White powder
Solid
Leu-Leu is a dipeptide formed from two L-leucine residues. It has a role as a human metabolite and a Mycoplasma genitalium metabolite. It derives from a L-leucine.

Basic Info

Product Name:

L-Leucyl-L-leucine

Other Name:

L-Leucine,L-leucyl-;Leucine,N-L-leucyl-,L-;L-Leucine,N-L-leucyl-;Leucine,N-L-leucyl-;L-Leucyl-L-leucine;Leucylleucine;NSC 89185;456: PN: EP2071334 SEQID: 488 claimed protein;456: PN: WO2009077864 SEQID: 488 claimed protein;11: PN: US20090239809 SEQID: 11 claimed protein;38: PN: EP2161028 PAGE: 10 claimed protein;2: PN: CN101845080 PAGE: 2 claimed protein;L-Leucinyl-L-leucine;21: PN: WO2014134509 SEQID: 21 claimed sequence;2: PN: CN110655554 PAGE: 2 claimed sequence;10: PN: WO2020097235 SEQID: 239 claimed protein

CAS No.:

3303-31-9

Molecular Formula:

C12H24N2O3

InChIKeys:

InChIKey=LCPYQJIKPJDLLB-UWVGGRQHSA-N

Molecular Weight:

244.33

Exact Mass:

244.33

EC Number:

221-976-6

DSSTox ID:

DTXSID00186696

Categories:

Polypeptide

Characteristics

PSA:

92.4

XLogP3:

-1.5

Appearance:

Solid

Melting Point:

270 °C

Boiling Point:

432.7°C at 760 mmHg

See More L-Leucyl-L-leucine Properties 

Hazard Identification

Classification of the substance or mixture

no data available

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)	no data available
Signal word	no data available
Hazard statement(s)	no data available
Prevention	no data available
Response	no data available
Storage	no data available
Disposal	no data available

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More L-Leucyl-L-leucine Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Weight Loss Peptide,Anti Aging Peptide,Nootropic,Pharmaceutical Intermediates,Cosmetic raw material,API

Location:
No. 23 Yanjia street, Daixi Subdistrict, Zouping City, Binzhou City, Shandong Province

Payment Terms:
TT against copy of documents,D/P,L/C,D/A,O/A,TT against B/L draft before shipment,100% TT in advance

Total Annual Revenue:
$5 million-$10 million

Total Employees:
11-50

Year of Establishment:
2026

Zikang Biotechnology Co., Ltd. is a premium manufacturer of chemical raw materials located in Shandong, China. The company mainly engages in fine chemicals and chemical raw materials, with products sold far to multiple regions including South America, Europe, Southeast Asia and the Middle East. We can provide customized product services for customers. Focused on the production of pharmaceutical intermediates, the company has obtained multiple system certifications. We have production teams and testing laboratories within Shandong Province. By choosing our company as your partner, you will gain premium products, efficient and reliable logistics distribution, as well as timely after-sales service.

We are committed to building long-term cooperative relationships with clients, guided by the business philosophy of win-win cooperation, integrity and transparency. Boasting professional sales and production teams, our company is capable of fulfilling clients' distinctive customized demands.

Inquiry History

2 Inquiries

Country	Product	Purchase Quantity	Date Posted
Australia	N-L-leucyl-L-leucine H-LEU-LEU-OH	1 KG	Mar 24, 2026
Spain	N-L-leucyl-L-leucine	50 KG	Sep 17, 2025

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Most Professional Factory Supply High Quality 99% N-L-leucyl-L-leucine CAS 3303-31-9

Product Description

Seller Information