Specification
| MF | C6H15ClN2O2 |
|---|---|
| Molecular weight | 182.65 |
Values are typical for the standard grade. Tighter specifications are available — state the target in your inquiry and we confirm against the production batch.
| MF | C6H15ClN2O2 |
|---|---|
| Molecular weight | 182.65 |
Values are typical for the standard grade. Tighter specifications are available — state the target in your inquiry and we confirm against the production batch.
数据转录自法规登记册和专业文献,并注明来源与版本。不能替代供应商的安全数据表。未记录来源的字段已作相应标注。
C(CCN)C[C@@H](C(=O)O)N.Cl 最后更新: 未确认
| 分子式 | C₆H₁₅ClN₂O₂[1] |
| 分子量 | 182.65 g/mol[1] |
| IUPAC名称 | (2S)-2,6-diaminohexanoic acid;hydrochloride[1] |
| SMILES | C(CCN)C[C@@H](C(=O)O)N.Cl[1] |
| InChIKey | BVHLGVCQOALMSV-JEDNCBNOSA-N[1] |
同义词: L-Lysine hydrochloride · 657-27-2 · L-Lysine monohydrochloride · lysine hydrochloride · L-Lysine, monohydrochloride
数据来源: PubChem (NLM/NIH)
最后更新: 2026-09-02
科学研究
MOLECULE 按CAS号参考文献(实时来自13+数据库)
来源: db:pubmed (7) · db:crossref (3)
光谱按需从9个来源获取。每个光谱都存储在我们的数据库中 — 下次打开时无需向外部API发出请求。无需搜索即可为每个光谱下载JCAMP-DX / CSV / PNG。
参考来源 — 无公共API。在外部数据库中打开:
🔗 IR/NMR/MS (SDBS) →参考来源 — 无公共API。在外部数据库中打开:
🔗 JP Monograph →参考来源 — 无公共API。在外部数据库中打开:
🔗 WHO INN →参考来源 — 无公共API。在外部数据库中打开:
🔗 DOAJ →该物质无统一的GHS分类——请参阅供应商当前的安全数据表(SDS)。
从所有Safety Hub选项卡收集的参考文献。CAS号: 657-27-2 ·
PubChem ↗
具有自身参考文献的选项卡(紧急情况、个人防护装备、储存、废物)在其各自章节中包含额外的书目条目。
粘贴一系列重复测量结果(CSV或每行一个数字)。计算器将计算平均值、标准差和95%置信区间,并检测异常值(Grubbs + Dixon Q)。
x̄ = Σxᵢ / n — 算术平均值s² = Σ(xᵢ - x̄)² / (n-1) — 样本方差s = √s² — 标准差RSD% = (s / x̄) × 100% — 相对标准差CI₉₅ = x̄ ± t(0.05, n-1) × s / √n — Student's tG = |xᵢ - x̄| / s — Grubbs检验Q = |xsuspect - xnearest| / |xmax - xmin| — Dixon Q-test来源:ICH Q2(R2) 分析方法验证 · ICH PDF ↗
从 20 种常用缓冲体系列表中选择 → 输入目标 pH → 获得精确配方,包括称量质量。
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657-27-2
— multi-criteria ranking (W12): 30%引用·20%近期性·20%主题·15%历史·15%开放获取.
分子特定场景、故障排除和文献参考
The predicted parameters for this molecule (CAS 657-27-2) are based on literature-backed models (Snyder-Dolan LSS, Neue pore-size rules).
⚠️ Predykcje oparte na modelach chemometrycznych — require validation against an actual measurement. Confidence: low/medium/high depending on the available descriptors.
Name + CAS + Grade + Role in method
HPLC vs LC-MS vs Far UV — when to use which
One-click add to cart
| Property | Acetonitrile (ACN) | Methanol (MeOH) |
|---|---|---|
| Viscosity (20°C) | 0.37 cP | 0.59 cP (+59%) |
| Back Pressure | ~150 bar | ~210 bar (+40%) |
| UV Cutoff | 190 nm | 205 nm |
| Elution Strength | Stronger | Weaker |
| Price (typical) | 115 PLN/L | 70 PLN/L (-39%) |
H = A + B/u + Cu
Higher viscosity (MeOH) → lower optimal flow rate → longer runtime.
Common Mistake: Using old buffer (>1 week room temp) = pH drift + microbial growth → ghost peaks.
How much you save by using naszej metody zamiast alternatyw? Kwartalne koszty labu HPLC.
| Nasza (ACN) | Alternatywa (MeOH) | |
|---|---|---|
| Cena/L | 115 PLN | 70 PLN |
| Runtime/sample | 23 min | 32 min (+40%) |
| Back pressure | 150 bar | 210 bar |
| Solwent/sample | ~130 mL | ~180 mL |
| Koszt/sample | ~5 PLN | ~4.5 PLN |
| Czas/sample | 23 min | 32 min |
| Czas pracy chemika | — | — |
| Total/quarter | — | — |
| Nasza (z guard) | Bez guard | |
|---|---|---|
| Guard column | 200 PLN / 100 inj | — |
| Main column lifetime | 2000 inj | 500 inj |
| Columns / quarter | — | — |
| Guards / quarter | — | — |
| Downtime wymiany (h) | — | — |
| Total/quarter | — | — |
| Nasza (SOP template) | Custom dev | |
|---|---|---|
| Initial setup | 1 h (use template) | 40 h (screening of phases, columns, gradients) |
| Walidacja (ICH Q2) | 8 h | 24 h |
| Dokumentacja | 2 h (edit template) | 16 h |
| Ryzyko OOS w Q1 | ~2% | ~15% |
| Total (jednorazowo) | — | — |
| Fast (5 min) | Standard (23 min) | |
|---|---|---|
| Runtime/sample | 5 min | 23 min |
| Samples/8h shift | — | — |
| Shifts potrzebnych | — | — |
| Koszt pracy | — | — |
| Savings | — | — |
Source: r/chemistry
Source: Chromatography Forum
Source: ResearchGate
Source: Snyder LSS Model
| # | Time | %B start | %B end | Duration | Slope (Δ%B/min) | Step |
|---|
💡 Rule of thumb: slope 2-5 %B/min gives the best peak shape · dwell vol = empty tubing from the pump to the column (check a blank run without the column) · k*·t0 ≥ 3 dla Rs ≥ 2.0.
Log k = log kw − S·φ, gdzie φ = fraction B. Optymalny gradient: Δφ ≈ 0.6–0.8 per 5 t0. Dla kolumny 250×4.6mm @ 1 mL/min → t0 ≈ 2 min → gradient 10–12 min.
Source: LCGC
Source: Snyder Seminar
Source: Predictive modeling
150×4.6 mm · 3.5 μm · pH 2–9
150×4.6 mm · 3.5 μm · pH 1–12 (high pH)
100×4.6 mm · 2.6 μm core-shell · fast
Source: Phenomenex Guide
Source: Phenomenex Knowledge
Source: Agilent App Notes
| Parameter | Value | Why |
|---|---|---|
| Wavelength | 210 nm (primary) + 254 nm (aromatic) | Uniwersalne dla COOH/C=O |
| Bandwidth | 4 nm | Balance of sensitivity vs selectivity |
| Response time | 0.5 s | Zgodne z peak width ~5 s |
| Reference λ | 360 nm, bw 100 nm | Kompensacja baseline drift |
| Parameter | Acceptance | Formula |
|---|---|---|
| Resolution (Rs) | ≥ 2.0 | 2(tR2 − tR1) / (w1 + w2) |
| Tailing factor (Tf) | ≤ 1.5 | W0.05 / (2·f) |
| Plates (N) | ≥ 5000 | 16·(tR / w)² |
| RSD (6 injections) | ≤ 2.0% | σ / μ × 100% |
| Linearity (R²) | ≥ 0.9990 | 80–120% spec, 5 levels |
The method was designed in accordance with the regulations below. Click a badge to see compliance details.
United States Pharmacopeia General Chapter — requirements for HPLC systems.
Reference: USP-NF 2024, General Chapter <621> Chromatography
International Council for Harmonisation — walidacja metod analitycznych.
Reference: ICH Q2(R1) Validation of Analytical Procedures, 2005
European Pharmacopoeia — chromatographic separation techniques.
Reference: EP 11.0, Chapter 2.2.46
Japanese Pharmacopoeia — aligned with USP/EP harmonisation after 2020.
Reference: JP 18th Edition, General Chapter 2.00
Current Good Manufacturing Practice for pharmaceutical products (USA).
Reference: 21 CFR Part 211 — Current Good Manufacturing Practice
International standard for the competence of testing laboratories.
Reference: ISO/IEC 17025:2017
Comparison of our recommended method vs USP Monograph vs PubMed literature vs Vendor Application Note.
| Parametr | Nasza metoda ★ | USP <621> | Literatura | Vendor (Agilent) |
|---|---|---|---|---|
| Kolumna | Zorbax Eclipse Plus C18 150×4.6 mm | L1 (C18, bonded, 5 μm) | n/a (brak PubMed refs dla tego CAS) | Zorbax SB-C18 150×4.6 mm |
| Particle size | 3.5 μm | 5 μm (USP default) | — | 5 μm |
| Faza A | 10 mM NH₄HCO₃ pH 7.0 | Phosphate buffer pH 2.5 | — | 0.1% TFA w H₂O |
| Faza B | Acetonitryl HPLC grade | Acetonitryl / Methanol | — | Acetonitryl / 0.1% TFA |
| Gradient | 5 → 95% B w 15 min (linear) | Isocratic (preferowane w USP) | — | 10 → 90% B w 20 min |
| Flow | 1.0 mL/min | 1.5 mL/min | — | 1.0 mL/min |
| Temperatura | 30°C | 25°C | — | 40°C |
| Detekcja | UV 210 nm + 254 nm | UV 254 nm (standard USP) | — | DAD 210/254 nm |
| Runtime | 23 min | 30 min | — | 25 min |
| Rs (typ.) | 2.3 | ≥ 2.0 | — | 2.1 |
| Walidacja | USP <621> + ICH Q2(R1) | USP <621> obligatoryjnie | — | Application note only |
| Solvent cost/run | ~5 PLN/run | ~7 PLN/run | — | ~6 PLN/run |
Pick a symptom → see the most likely causes → click to see the fix.
Diagnoza: Column oven on? 30°C?
Fix: Turn the column thermostat on to 30°C.
Diagnoza: Method → DAD → Primary λ — check whether it is 210
Fix: Change the wavelength to 210 nm for compounds without aromatic rings.
Diagnoza: Status lampki na detektorze — zielona?
Fix: Turn on the lamp, wait 3-5 min for warm-up.
Diagnoza: Is the sample >0.1 mg/mL?
Fix: Increase the concentration 10× to 1 mg/mL.
Diagnoza: Do you filter samples through 0.22 μm?
Fix: Replace the column frit OR the guard column. In future, filter every sample.
Diagnoza: Jaki slope %B/min?
Fix: Zwolnij gradient: 13→56% B w 20 min zamiast 15 min.
Diagnoza: Flow 1.5 mL/min?
Fix: Zmniejsz do 0.8 mL/min.
Diagnoza: Zmierz pH bufora — 7.0±0.2?
Fix: Make fresh buffer 10 mM NH₄HCO₃ pH 7.0.
Diagnoza: Number of injections? >2000?
Fix: Regeneruj: flush 100% ACN 30 min, potem 100% MeOH 30 min.
Diagnoza: Fronting + tailing at the same time? Concentration >5 mg/mL?
Fix: Reduce inj. vol 10→5 μL or dilute 2×.
Source: USP Online
Source: ICH Q6A
Source: FDA Guidance
Particles >0.22 μm clog the column inlet frit. Pressure rises +50 bar per 100 injections. Column lifetime drops from 2000 to 500 injections. Filter cost: 2 PLN. Column cost: 1800 PLN.
Full protocol with all parameters
GMP-compliant SOP template
ICH Q2(R1) validation template
All references in BibTeX format
真实化学家的失误 — 发生了什么、什么有帮助、要避免什么。
Day 90 stability pull. 6 batch × 2 repeats. W próbce widzę duplikaty peaków z poprzedniego dnia. OOS opened. 4 dni investigation. Root cause: nie pomylony carry-over, tylko buffer NH4HCO3 zostawiony w systemie weekend = bakterie.
NIGDY nie zostawiaj buforu w systemie >3 dni. Zawsze flush z 80% ACN/20% H2O przed weekendem. Koszt lekcji: 4 dni pracy + 3 batch release delay.
Q1 audit: column cost +340% vs Q4. QA blamed the lab. Investigation: a new operator was using a 0.45 μm filter instead of 0.22 μm. Microparticles got through the guard and were killing the main columns by the 100th injection.
The filter SOP must be WRITTEN and checked every batch. 0.22 μm is the standard per USP . Cost of the error: 10 columns × 1800 PLN = 18,000 PLN + audit finding.
Do you have experience with this method? A problem you solved? A mishap you want to spare others? Write to us — after moderator approval it will appear here as „real case".
以上折叠面板中针对CAS号657-27-2引用的所有科学来源。格式: 《芝加哥格式手册》第17版,作者-日期系统.