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EC number: 310-290-3 | CAS number: 161907-80-8
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
B-TTEGME contains three borated glycol esters, i.e., its components belong to the same functional class and are homologues. Its major components are B-TEGME (50% of B-TTEGME) and B-tetraEGME (40% of B-TTEMGE). B-PentaEGME contributes 10% to B-TTEGME. Ester moieties are cleaved by hydrolysis. Based on the finding that spontaneous hydrolysis occurs after addition of water to B-TEGME, at buffers 1.4, 4, 7 and 9, it is assumed that the two other B-TTEGME glycol esters are similarly hydrolyzed at these conditions..
Key value for chemical safety assessment
- Half-life for hydrolysis:
- 1 d
- at the temperature of:
- 20 °C
Additional information
B-TTEGME is a mixture of three different borated glycol esters which differ solely by the length of their "-CH2 -CH2 -O-" (glycol ether) side chains (homologues). Their basic chemical structure is identical: One boric acid molecule forms an ester with three polyethylene glycol ethers of different chain length, i.e., either three, four or five glycol ether entities. The following describes the typical composition of B-TTEGME (CAS 161907-80-8):
50 % B-TEGME (CAS 30989 -05-0) – three polyethylene glycol ether moieties with 3 glycols each (CAS 112 -35 -6)
40 % B-TetraEGME (CAS 57057-98-4) – three polyethylene glycol ether moieties with 4 glycols each (CAS 237 -42 -8)
10 % B-PentaEGME (CAS 75672 -72-9) - three polyethylene glycol ether moieties with 5 glycols each (CAS 23778 -52 -1)
Abiotic breakdown of this chemical class is by hydrolytic cleavage of the ester bond. Since ester cleavage is independent from the length of the side chain, the hydrolysis of B-TEGME is relevant to describe the hydrolysis of the other two borated glycol esters of B-TTEGME.
BASF 1999a investigated the hydrolysis of B-TEGME as a function of the pH and confirms the instability of B-TEGME in the environment: B-TEGME was added to 4 buffer solutions at pH 1.4, 4, 7 and 9. The IR spectrum of the solution, taken immediately after addition of water, showed a dramatic change, when compared with the IR spectrum of the original substance. This indicates spontaneous hydrolysis of B-TEGME.
Due to the fact that B-TEGME is hydrolysed spontaneously, and since the two other components of B-TTEGME are chemical homologues (boric esters with different side chain length), it is concluded that B-TTEGME is also hydrolysed spontaneously at pH 1.4,4,7 and 9.
It should be mentioned that in accordance with EC 1907/2006, Annex VIII, point 9.2.2.1, column 2, hydrolysis as a function of the pH is not required since B-TTEGME is assumed readily biodegradable, as shown in section 4.1.2.1.2.
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