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Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder

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Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder

Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder
Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder
Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder

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Product Details:
Place of Origin: CHINA
Brand Name: YIXIN
Certification: ISO9001
Model Number: YXB-005
Payment & Shipping Terms:
Minimum Order Quantity: 1-20ton
Packaging Details: 25kg/bag
Delivery Time: 5-12days after recieved deposit
Payment Terms: L/C, T/T, Western Union
Supply Ability: 5000ton/per month

Fiberglass Making Borax Acid Powder White 99.5% Orthoboric Acid Powder

Description
UN NO: 1439 Color: White
Properties: Powder Purity: 99.5%
Packing: 25kg Density: 1.44
High Light:

boric acid crystals

,

pure boric acid

Industry grade boric acid 99.5%  orthoboric acid powder H3BO3 use for fiberglass making and Fire retarding agent

►Product description

 

Poruct name

 Boric acid

Molecular formula H3BO3
Molecular wight 61.83
Properties Colorless crystal or white powder
Purity 99.5%
UN number 1439

 

 

►Specification

 

Item

Specification

H3BO3 99.50%
NH3 0.60%
SO4 0.30%
CL ≤0.15%
Fe ≤0.06%
Water insoluble ≤0.06%

►Origin of Boric acid 

 

    Boric acid, also called hydrogen borate, boracic acid, orthoboric acid and

 

acidum boricum, is a weak, monobasic Lewis acid of boron, which is often

 

used as an antiseptic, insecticide, flame retardant, neutron absorber, or

 

precursor to other chemical compounds. It has the chemical formula H3BO3

 

(sometimes written B(OH)3), and exists in the form of colorless crystals or a

 

white powder that dissolves in water. When occurring as a mineral, it is called

 

sassolite.

  ► Molecular and crystal structure

 

  The three oxygen atoms form a trigonal planar geometry around the boron. The B-

 

O bond length is 136 pm and the O-H is 97 pm. The molecular point group is C3h.

 

Crystalline boric acid consists of layers of B(OH)3 molecules held together by

 

hydrogen bonds of length 272 pm. The distance between two adjacent layers is

 

318 pm.


    Based on mammalian median lethal dose (LD50) rating of 2,660 mg/kg body

 

mass, boric acid is only poisonous if taken internally or inhaled in large quantities.

 

The Fourteenth Edition of the Merck Index indicates that the LD50 of boric acid is

 

5.14 g/kg for oral dosages given to rats, and that 5 to 20 g/kg has produced death

 

in adult humans. For comparison's sake, the LD50 of salt is reported to be 3.75

 

g/kg in rats according to the Merck Index. According to the Agency for Toxic

 

Substances and Disease Registry, "The minimal lethal dose of ingested boron (as

 

boric acid) was reported to be 2–3 g in infants, 5–6 g in children, and 15–20 g in

 

adults. However, a review of 784 human poisonings with boric acid (10–88 g)

 

reported no fatalities, with 88% of cases being asymptomatic."Toxicology

 

Long-term exposure to boric acid may be of more concern, causing kidney damage

 

and eventually kidney failure (see links below). Although it does not appear to be

 

carcinogenic, studies in dogs have reported testicular atrophy after exposure to 32

 

mg/kg bw/day for 90 days. This level is far lower than the LD50.

 

    According to the boric acid IUCLID Dataset published by the European

 

Commission, boric acid in high doses shows significant developmental toxicity and

 

teratogenicity in rabbit, rat, and mouse fetuses as well as cardiovascular defects,

 

skeletal variations, and mild kidney lesions. As a consequence in the 30th ATP to

 

EU directive 67/548/EEC of August 2008, the European Commission decided to

 

amend its classification as reprotoxic category 2, and to apply the risk phrases R60

 

(may impair fertility) and R61 (may cause harm to the unborn child).

 

      At a 2010 European Diagnostics Manufacturing Association (EDMA) Meeting,

 

several new additions to the Substance of Very High Concern (SVHC) candidate

 

list in relation to the Registration, Evaluation, Authorisation and Restriction of

 

Chemicals Regulations 2007 (REACH) were discussed. Following the registration

 

and review completed as part of REACH, the classification of Boric Acid CAS

 

10043-35-3 / 11113-50-1 is listed from 1 December 2010 is H360FD (May damage

 

fertility. May damage the unborn child.)

 

 ►Preparation

 

     Boric acid may be prepared by reacting borax (sodium tetraborate

 

decahydrate) with a mineral acid, such as hydrochloric acid:

 

Na2B4O7·10H2O + 2 HCl → 4 B(OH)3 [or H3BO3] + 2 NaCl + 5 H2O

 

It is also formed as a by product of hydrolysis of boron trihalides and

 

diborane

 

B2H6 + 6 H2O → 2 B(OH)3 + 6 H2

 

BX3 + 3 H2O → B(OH)3 + 3 HX (X = Cl, Br, I)

 

 ►Application in Industry

 

1. Glass making 

 

  The primary industrial use of boric acid is in the manufacture of monofilament

 

fiberglass usually referred to as textile fiberglass. Textile fiberglass is used to

 

reinforce plastics in applications that range from boats, to industrial piping to

 

computer circuit boards.

 

 

2. Fire retarding agent

 

 

  Boric acid, mixed with borax (sodium tetraborate decahydrate) at the weight ratio

 

of 4:5, is highly soluble in water, though they are not so soluble separately. The

 

solution is used for fire retarding agent of wood by impregnation.

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