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Home ProductsBorax 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

    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
    Contact Now
    Detailed Product Description
    UN NO: 1439 Color: White
    Properties: Powder Purity: 99.5%
    Packing: 25kg Density: 1.44

    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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