Product name: 2‑Butyne‑1,4‑diol (1,4‑Butynediol, BYD) 48‑50 % Aqueous Solution
CAS‑No: 110‑65‑6 (active substance)
EC‑No(EINECS): 203‑788‑6
Synonym: BYD 48‑50% aqueous solution
Molecular Formula (pure):C4H6O2Molecular Weight (pure): 86.09 g/molc
1. Physical‑Chemical Properties (Solution)
Boiling point ~100 ℃ (aqueous solution)
Flash point (closed‑cup) >93 ℃
Solubility Fully miscible with water, alcohols
Viscosity @20℃ ~12‑16 mPa·s
Storage stability Stable under normal ambient condition
2. Typical Specification (Export Industrial Grade, 48‑50% solution)
| Test Item | Specification | Test Method |
|---|---|---|
| Appearance | Colourless to pale‑yellow clear liquid, no sediment | Visual inspection |
| 1,4‑Butynediol content (GC, wt%) | 48.0 ~ 50.0 % | Gas Chromatography GC |
| Free Formaldehyde, wt% | ≤ 0.30 % max | Titration / GC |
| Propargyl alcohol impurity, wt% | ≤ 0.30 % max | GC |
| pH (undiluted solution @23℃) | 6.0‑9.0 | pH‑Meter |
| Density @20℃, kg/m³ | 1090‑1120 | Density meter |
| Water content (balance) | Balance | Calculation / Karl‑Fischer |
3. Main Applications
Raw material for nickel electroplating brightener formulation
Intermediate for hydrogenation‑process to produce 1,4‑butenediol / BDO
Oil‑field corrosion inhibitor intermediate, fine‑chemical synthesis feedstock
4. Handling, Storage & Transportation
Storage: Keep tanks/drums sealed, cool & well‑ventilated; storage temperature 5‑30 ℃. Keep away from strong oxidants, strong acids, strong bases. Avoid direct sunlight.Packing: 40kg or 200 L galvanized steel drum; IBC tank 1000L
Transport Information:
UN‑No: UN 2810
Proper Shipping Name: Toxic liquid, organic, N.O.S. (2‑Butyne‑1,4‑diol aqueous solution)
Hazard Class: 6.1 Toxic substance, Packing Group III
HS‑Code: 29053995
GHS Hazard Statements for mixture:
H301 Toxic if swallowed
H311 Toxic in contact with skin
H331 Toxic if inhaled
H314 Causes severe skin burns and eye damage
H317 May cause allergic skin reaction
H372 Causes damage to organs through prolonged or repeated exposure
H412 Harmful to aquatic life with long‑lasting effects
Disclaimer
All values listed are typical properties only for reference, not contractual guarantee. Please refer to batch‑specific COA & SDS for exact batch data.
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