For research use only. We do not sell to patients.
Ionizable lipids / RCB-4-8
RCB-4-8 chemical structure
Product imageResearch use only
CAT. NO. DC65682Featured

RCB-4-8

Ionizable lipid for LNP and nucleic-acid delivery research.

Pack size & price

USD
TotalUS$750
We match the best price and quality on market.
Ships from ShanghaiIce-pack transportPure lipid recommended
Product overview

Description & Application

RCB-4-8​​ is a biodegradable ionizable lipid nanoparticle (LNP) engineered for efficient pulmonary mRNA delivery and in vivo genome editing, as detailed in the primary research article ​​"Combinatorial design of nanoparticles for pulmonary mRNA delivery and genome editing"​​ (Li et al., Nature Biotechnology 2023）. Synthesized from a combinatorial library of 720 biodegradable lipids via a three-component reaction system, RCB-4-8 features an alkyne-containing lipid tail and tertiary amine headgroup, optimized through high-throughput screening for superior lung-targeting capabilities. Its unique molecular design incorporates hydrolyzable ester and carbonate groups, enabling rapid biodegradation (<30% lung retention at 48 h vs. >90% for conventional lipids) while maintaining high transfection efficiency. When formulated with DOTAP instead of DOPE, RCB-4-8 LNPs achieved ​​100-fold higher luciferase mRNA expression​​ in murine lungs compared to FDA-approved MC3 LNPs and mediated ​​95% GFP knockout​​ in vitro. In Ai9 reporter mice, intratracheal delivery of RCB-4-8 loaded with Cre mRNA edited ​​53% of total lung cells​​ after three doses, while codelivery with Cas9 mRNA/sgRNA yielded ​​7.2% tdTomato<sup>+</sup> cells​​, rising to ​​17%​​ when combined with AAV-sgRNAs. With an optimal particle size of ​​85.7 nm​​ (PDI 0.11) and ​​>87% mRNA encapsulation​​, RCB-4-8 supports repeat dosing and represents a transformative platform for inhalable gene therapies targeting congenital lung diseases like cystic fibrosis.

CAS No.Not available
Chemical NameRCB-4-8
SynonymsRCB-4-8,RCB48， RCB 4 8,bis((Z)-12-(((non-2-yn-1-yloxy)carbonyl)oxy)octadec-9-en-1-yl) 3,3’-((2-(diethylamino)ethyl)azanediyl)dipropionate
SMILESCCN(CC)CCN(CCC(OCCCCCCCC/C=C\CC(CCCCCC)OC(OCC#CCCCCCC)=O)=O)CCC(OCCCCCCCC/C=C\CC(CCCCCC)OC(OCC#CCCCCCC)=O)=O
FormulaC68H120N2O10
M.Wt1,125.7
PurityELSD-HPLC>95%
StoragePure form: −20 °C, 1 year; In solvent: −80 °C, 6 months; −20 °C, 1 month. Sealed and protected from light.
Shipping conditionShips from Shanghai. Pure lipid is stable during ice-pack transport.
PublicationLi, B., Manan, R.S., Liang, S.-Q., et al. Combinatorial design of nanoparticles for pulmonary mRNA delivery and genome editing. Nat. Biotechnol.
Laboratory planning

Solution Calculators

The product molecular weight is prefilled when available and remains editable. Confirm solvent compatibility and solubility before preparation.

Mass = concentration × volume × molecular weight
Enter any three values to calculate the fourth.
C₁V₁ = C₂V₂
Enter any three values to calculate the fourth.
Preparing stock solutions

Quick preparation table

Solvent volumes update from the molecular weight above.

Mass1 mM5 mM10 mM
10 mg8.8834 mL1.7767 mL888.34 μL
25 mg22.2084 mL4.4417 mL2.2208 mL
50 mg44.4168 mL8.8834 mL4.4417 mL
100 mg88.8336 mL17.7667 mL8.8834 mL
250 mg222.0840 mL44.4168 mL22.2084 mL

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Handling guidance

Shipping, storage and sampling

How is the lipid shipped, and how should I store it?
We generally ship the neat (undissolved) lipid compound rather than an ethanol solution. The neat lipid is stable during transport with ice packs, and shipments originate from Shanghai. Pure form: store at −20 °C for up to 1 year. In solvent: store at −80 °C for up to 6 months or at −20 °C for up to 1 month. Keep sealed and protected from light. Avoid repeated thaw cycles for best results.
Pure lipid or solution — which should I choose?
Pure lipid is generally more stable during shipping and storage, so we usually recommend the pure form. A solution in ethanol or chloroform can be supplied when required by your workflow. Tell us the intended application, solvent and target concentration so the most suitable format can be confirmed.
How should I measure a small amount of oily or viscous lipid?
Ionizable lipids are often oily liquids or viscous semisolids, so material can be lost during repeated weighing or transfer. For a small pack, dissolve the entire quantity and aliquot it volumetrically. For example, add 1 mL ethanol to 25 mg lipid to prepare a 25 mg/mL stock, then use a pipette to withdraw the required amount. For quantities above 100 mg, direct weighing with an analytical balance may be more practical. Always confirm solvent compatibility and solubility first.
Can you support formulation optimization and scale-up?
Yes. Share the RNA cargo, target tissue, administration route, formulation method and assay plan. Our team can discuss starting molar ratios, N/P ratio and scale-up requirements for research workflows.