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The engineering-grade
chemical database

Thermodynamic data, GHS safety compliance, interactive engineering calculators, and an AI assistant — built for lab and plant, not textbooks.

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1,240+

Chemicals

Everything a chemist or engineer needs

Not just a dictionary — a design tool. From lab safety compliance to plant-scale engineering calculations.

CORE

Thermodynamic data

Antoine vapor pressure, Shomate Cp(T) curves, critical properties, enthalpy of vaporization — all with valid temperature ranges and source verification.

Antoine equation (A, B, C)
Shomate Cp(T)
Critical Tc, Pc, ω
Enthalpy of vaporization

SAFETY

GHS & NFPA compliance

Full GHS classification with 9 pictograms, H/P-statements, NFPA 704 fire diamonds, TLV/PEL exposure limits, flash points, and NEQS effluent discharge limits.

9 GHS pictograms
H & P statements
NFPA 704 diamond
TLV-TWA / PEL limits

ENGINEERING

Interactive calculators

Live Antoine vapor pressure calculations across 6 unit systems, temperature-dependent Cp charts, material compatibility tables, dilution and buffer calculators.

6-unit vapor pressure
Cp(T) area chart
Material compatibility
Dilution & buffer prep

ChemAssist AI

Claude-powered natural language search, solvent selection AI, mixing compatibility checker, process parameter estimation, and SDS auto-generation.

Natural language search
Solvent selector
Compatibility check
SDS PDF generation

DATABASE

1,240 chemicals.
Every property you need.

Phase 1–3 data on every record: scalar physical properties, GHS safety data, Antoine/Shomate thermodynamic coefficients, critical properties, pKa, material compatibility, and spectral data.

Molecular weightg/mol

Boiling/melting pointK and °C

Density & viscositykg/m³, Pa·s

Critical Tc, Pc, ωfor EOS

pKa / pKbmulti-protic

Solubility table7 solvents

Ethanol

C₂H₆O

alcohol⚠ flammable

46.069

g/mol

78.4

°C

789

kg/m³

Cₚ

2440

J/(kg·K)

1.19

mPa·s

n²⁰ᴅ

1.361

NFPA 704

Antoine @ 298 K

58.2 mmHg · 7.76 kPa · 0.077 bar

+ GHS · SDS · AI Assistant

AI CHEMASSIST

Ask in plain English.
Get engineering answers.

ChemAssist is trained on the full Enthalpix database and can answer property questions, run Antoine calculations, explain GHS ratings, and recommend solvents — all in a single message.

ChemAssist

Online

Best aprotic polar solvent for a Grignard reaction — stable with RMgX, bp 60–120°C, low toxicity.

Based on your criteria, here are my top recommendations from the database:

1. Tetrahydrofuran (THF) — bp 66°C, excellent for Grignard, miscible with RMgX. Caution: forms explosive peroxides on storage — use fresh or inhibited with BHT.

2. 2-MeTHF — bp 80°C, renewable source, now preferred in pharmaceutical Grignard chemistry. Better water tolerance than THF.

Using Antoine A=6.99515, B=1202.29, C=226.254 for THF: vapor pressure at 25°C = 21.4 kPa — ensure adequate ventilation.

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25 searches per day
Core physical properties
Antoine vapor pressure
Basic hazard labels
1 chemical comparison
GHS / NFPA data
SDS generation
AI ChemAssist
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The engineering-gradechemical database